100 Quantum Computing Companies Shaping the Global Quantum Revolution (2025)

Quantum computing is accelerating worldwide, with innovations spanning hardware, software, cryptography, networking, and services. Below is a comprehensive alphabetical list of 100 key quantum computing companies across the globe, each with a brief overview of their focus, notable milestones, and a link to their official website. Use the quick navigation table to jump by letter.

0–9

01 Communique

01 Communique – A cybersecurity company that pivoted to post-quantum cryptography. In 2018 it began focusing on quantum-safe encryption, developing its IronCAP™ software to protect client data from future quantum attacks quantumcomputingreport.com. Notably, 01 Communique transitioned from remote access services to pioneering post-quantum blockchain and cryptography solutions ahead of many competitors quantumcomputingreport.com.

1QBit

1QBit – A Vancouver-based quantum software and consulting startup (founded in 2012) that partners with Fortune 500 firms to solve industry problems using advanced algorithms on both classical and quantum hardware quantumcomputingreport.com. 1QBit was one of the first dedicated quantum computing software companies and has focused on optimization, machine learning, and quantum-inspired solutions, often leveraging D-Wave’s annealers for real-world use cases quantumcomputingreport.com.

A

Accenture (Quantum Services)

Accenture Labs – A global consulting firm actively involved in quantum computing services. Accenture formed a quantum research group in 2017 and partnered with startups like 1QBit to identify 150+ promising use cases for quantum in industries such as pharma and finance quantumcomputingreport.com. Through its Accenture Quantum Lab, the company offers end-to-end quantum strategy and implementation services to help clients explore quantum advantages (from roadmap to prototype) deloitte.com.

Aegiq

Aegiq – A UK-based photonic quantum computing startup (University of Sheffield spin-off, founded 2019) developing semiconductor-based sources of indistinguishable single photons quantumcomputingreport.com. Aegiq’s integrated photonic approach aims for scalable and modular quantum processors, targeting use cases in defense, aerospace, cybersecurity and more builtin.com. The company has attracted attention for its work on quantum photonic chips and secured government grants in the UK builtin.com.

Agnostiq

Agnostiq – A Toronto-based quantum software startup (founded 2018) focused on making advanced computing resources more accessible quantumcomputingreport.com. Agnostiq develops workflow tools for hybrid HPC and quantum computing, including its Covalent platform which helps enterprises run quantum algorithms on cloud hardware. With an interdisciplinary team of physicists and computer scientists quantumcomputingreport.com, Agnostiq addresses practical challenges like resource management and error mitigation in near-term quantum and quantum-inspired computing.

Airbus (Quantum R&D)

Airbus – The European aerospace giant isn’t a quantum hardware maker but has established a dedicated quantum research unit. In 2020, Airbus set up a lab in Newport, UK to explore quantum computing applications in aerospace – such as big-data search, aircraft design, and materials discovery quantumcomputingreport.com. The company also invested in quantum startups (e.g. partnering with QC Ware) and launched annual quantum challenges to spur algorithm development in areas like flight routing and optimization quantumcomputingreport.com. Airbus’ involvement underscores the cross-industry interest in quantum for complex engineering problems.

Algorithmiq

Algorithmiq – A Finnish startup (founded 2020) on a mission to revolutionize life sciences via quantum algorithms quantumcomputingreport.com. Algorithmiq develops quantum software for drug discovery and molecular simulation, aiming to leverage quantum computers to solve chemistry problems that are intractable for classical methods. The company envisions a future where new drugs can be discovered “quickly, efficiently, and cost-effectively” by combining quantum computing with classical simulations quantumcomputingreport.com. In 2023, Algorithmiq was recognized as a World Economic Forum Technology Pioneer for its work in quantum-enabled life science solutions.

Alibaba (Alibaba Quantum Laboratory)

Alibaba Group – The Chinese tech giant operates the Alibaba Quantum Laboratory (AQL) in partnership with the Chinese Academy of Sciences. Based in Shanghai, this lab merges Alibaba’s expertise in cloud computing with CAS’s strengths in quantum physics quantumcomputingreport.com. Alibaba’s quantum efforts span quantum theory research, security for e-commerce, and improving computing performance quantumcomputingreport.com. Notably, Alibaba was among the first in China to offer cloud access to quantum processors and has pursued quantum-based security techniques for its data centers quantumcomputingreport.com.

Alice & Bob

Alice&Bob – A French quantum hardware startup (founded 2020) developing a universal quantum computer based on superconducting “cat qubits” quantumcomputingreport.com. Their approach encodes qubits in special microwave photon states (Schrödinger cat states) to exponentially suppress bit-flip errors quantumcomputingreport.com. Alice&Bob’s innovation could greatly improve qubit stability and fault-tolerance. In 2022, the Paris-based team announced they had demonstrated a prototypical cat qubit with enhanced error resilience, highlighting progress toward logical qubits without full error correction overhead.

Aliro Quantum

Aliro Quantum – A U.S. startup (spun out of Harvard in 2019) focused on quantum networks and developer tools quantumcomputingreport.com. Aliro provides a quantum network simulation and management platform that helps organizations design and emulate quantum communication networks quantumcomputingreport.com. It partners with national labs and hardware vendors (like IBM, Honeywell, Rigetti) to ensure its software can interface with cutting-edge systems. By building development environments for quantum networking, Aliro aims to be an early enabler of the Quantum Internet.

Alpine Quantum Technologies (AQT)

AQT – An Innsbruck, Austria-based company (founded 2018 by University of Innsbruck researchers) constructing ion-trap quantum computers quantumcomputingreport.com. AQT’s three co-founders (Rainer Blatt, Thomas Monz, and Peter Zoller) are renowned physicists who translated decades of trapped-ion research into a commercial venture builtin.com. The company’s goal is to build modular and scalable ion-trap processors. AQT has already demonstrated high-fidelity ion qubits and is supported by European research grants to eventually deliver an Austrian quantum computer builtin.com.

Amazon Web Services (AWS) – Amazon Braket

Amazon Braket – AWS’s cloud quantum computing service that provides users access to multiple quantum hardware platforms via the cloud. Launched in 2019, Amazon Braket offers on-demand use of devices from D-Wave, IonQ, Rigetti, and others, through a unified interface quantumcomputingreport.com. AWS also founded the AWS Center for Quantum Computing at Caltech to pursue in-house quantum hardware R&D quantumcomputingreport.com. Through its Quantum Solutions Lab, AWS works directly with businesses to develop quantum applications quantumcomputingreport.com. This full-stack approach (cloud access + research) underscores Amazon’s commitment to making quantum computing widely accessible.

Anyon Systems

Anyon Systems – A Canadian quantum hardware startup (founded 2014) that began by developing quantum electronic design automation tools and then moved on to building its own superconducting quantum computers quantumcomputingreport.com. Anyon Systems has designed proprietary cryogenic systems and control electronics, and is now commercializing integrated superconducting quantum processors quantumcomputingreport.com. Headquartered in Quebec, the company delivered one of Canada’s first home-grown quantum computers (a small superconducting system) to a government laboratory in 2022. Anyon’s vertically-integrated approach (designing everything from qubits to control hardware) aims to optimize the entire quantum stack for performance.

Archer Materials

Archer Materials – An Australian company (based in Adelaide) developing innovative quantum semiconductor devices. In late 2018, Archer licensed a novel room-temperature quantum bit technology (a carbon-based qubit chip using atomic-scale defects) from the University of Sydney quantumcomputingreport.com. Archer’s goal is to build a portable, room-temperature quantum computing device using this ^12CQ qubit technology quantumcomputingreport.com. The company has demonstrated basic operations of a carbon nanosphere qubit and is now working on integrating it into prototype quantum chips. Archer is notable for pursuing quantum computing with materials that don’t require extreme cooling.

Arqit

Arqit – A UK-based company offering a quantum encryption Platform-as-a-Service known as QuantumCloud™ quantumcomputingreport.com. Arqit’s technology enables devices to download lightweight agents that then generate symmetric encryption keys on the fly with partner devices quantumcomputingreport.com. These keys are one-time use and quantum-safe, providing protection against future quantum decryption threats. Arqit went public via SPAC in 2021 and has since worked with governments and enterprises on securing communications quantumcomputingreport.com. It’s recognized for its innovative approach to distributing cryptographic keys without relying on traditional public-key infrastructure, using protocols that anticipate advanced quantum attacks.

Atlantic Quantum

Atlantic Quantum – A U.S. startup (with roots at MIT) developing next-generation superconducting quantum processors. Atlantic Quantum is known for using fluxonium qubits and novel error mitigation techniques to achieve higher qubit coherence and scalability atlantic-quantum.com. Founded in 2021, the company has taken a systems-engineering approach to tackle the big three issues in superconducting qubits: speed, accuracy, and scalability atlantic-quantum.com atlantic-quantum.com. It attracted seed funding from The Engine (MIT’s venture fund) and others, and by 2023 demonstrated prototype fluxonium qubits with improved fidelities. Atlantic Quantum’s impressive investor backing (including VCs supported by Bill Gates, Jeff Bezos, and others) attests to the promise of its technology explodingtopics.com.

Atom Computing

Atom Computing – A Silicon Valley and Boulder-based startup (founded 2018) building quantum computers using neutral atoms as qubits spinquanta.com. Atom Computing’s approach traps arrays of optically trapped atoms (like strontium) and uses their electronic states as qubits, which show long coherence times. In 2021, the company unveiled a prototype 100-qubit system named Phoenix, demonstrating high parallelism in qubit control. Neutral-atom qubits are promising for scaling, and Atom Computing has achieved significant funding to pursue a full-stack solution. The company’s early achievements include relatively long-lived qubits and high connectivity in a 2D atomic array spinquanta.com.

Atos (Eviden)

Atos Quantum – Atos SE, the French IT giant, launched a dedicated Atos Quantum program in 2016 and became a recognized player in quantum computing through its simulation and software offerings spinquanta.com. Atos developed the Quantum Learning Machine (QLM) – an on-premises high-performance quantum simulator that allows researchers to develop and test quantum algorithms on up to dozens of qubits spinquanta.com. The QLM has been adopted by national labs and universities worldwide as a training and algorithm development tool. In 2023, Atos spun off its tech division (Eviden), which continues to advance Atos’s quantum initiatives. By providing a powerful quantum simulation environment and consulting services, Atos/Eviden helps organizations prepare for the coming era of quantum computing.

B

Baidu (Quantum Computing Institute)

Baidu – The Chinese search and AI company launched its Institute for Quantum Computing in 2018, led by UTS Professor Runyao Duan quantumcomputingreport.com. Baidu’s quantum division concentrated on software and applications, aiming to integrate quantum computing into the company’s core businesses such as search engine optimization and artificial intelligence quantumcomputingreport.com. They developed their own open-source framework “QCompute” and demonstrated a 10-qubit superconducting prototype in 2021. However, in 2023 Baidu reportedly decided to wind down its quantum R&D, donating its lab to a government institute as it refocuses on nearer-term tech quantumcomputingreport.com. Despite this, Baidu’s earlier contributions – like its quantum machine learning toolkit and research on quantum AI – were significant in China’s quantum landscape.

Bleximo

Bleximo – A U.S. startup (based in California) founded in 2017 that is building application-specific superconducting quantum computers x.com. Bleximo’s strategy is to co-design algorithms and hardware for specific problem classes (e.g. quantum chemistry or optimization) rather than pursuing large general-purpose quantum computers x.com. The company has developed multi-qubit superconducting chips and a software stack tuned for particular industry use cases. Bleximo has received funding to set up a quantum manufacturing facility in New York state ny-creates.org. Its focus on “quantum accelerators” for targeted tasks – combining classical/quantum co-processing – is seen as a pragmatic path to achieving quantum advantage sooner in commercial settings x.com.

Booz Allen Hamilton (Quantum)

Booz Allen Hamilton – A major U.S. defense consulting firm that established a dedicated quantum team within its Data Science & Analytics group quantumcomputingreport.com. Booz Allen has been one of the first consulting firms to use quantum computing to solve real-world client problems in areas like logistics, scheduling, and optimization quantumcomputingreport.com. They have advertised successes in demonstrating quantum solutions for vehicle routing and job scheduling for government clients. Booz Allen’s quantum consultants also help organizations assess the impact of quantum on cybersecurity and develop quantum-resistant strategies. By integrating quantum into its services early, Booz Allen aims to prepare its government and business clients for the coming quantum disruption.

BT (Quantum-Secured Networks)

BT Group – The UK telecommunications company is a leader in deploying quantum-safe communication networks. In 2022, BT (in partnership with Toshiba) launched the world’s first commercial trial of a quantum-secured metro network in London reuters.com. This network uses quantum key distribution (QKD) over standard fiber to secure data links for financial institutions. BT has also run trials of innovative miniaturized QKD devices from startups (e.g. testing a chip-based QKD prototype from KETS Quantum) manufacturingmanagement.co.uk. With multiple testbeds and pilots, BT is preparing its infrastructure for the Quantum Internet era – positioning itself to offer Quantum-Key-as-a-Service to customers. Its efforts underscore the telecommunications sector’s vital role in quantum cybersecurity.

BTQ

BTQ – A quantum technology company headquartered in Canada (with offices in Liechtenstein, Taiwan, Japan, and Australia) focusing on post-quantum blockchain and network security solutions quantumcomputingreport.com. BTQ (Blockchain Technology + Quantum) is developing quantum-safe encryption methods for mission-critical networks, emphasizing secure distributed ledger (blockchain) applications quantumcomputingreport.com. The company is also designing a hardware accelerator for post-quantum cryptography. BTQ went public on a Canadian exchange in 2023, reflecting the growing interest in quantum-safe communications quantumcomputingreport.com. By establishing global outposts, BTQ aims to help enterprises and governments transition to cryptographic systems resistant to quantum attacks.

C

Capgemini (Quantum Lab)

Capgemini Q-Lab – Capgemini, a multinational IT consultancy, launched a dedicated Quantum Lab (Q-Lab) in 2022 to spearhead its quantum technology initiatives capgemini.com. The Q-Lab comprises quantum experts across a global network (with hubs in the UK, Portugal, and India) and coordinates R&D in quantum computing, communications, and sensing capgemini.com. Capgemini’s Q-Lab collaborates with hardware providers (it became an IBM Quantum Hub to access IBM’s 127-qubit processors) and focuses on developing industry-specific quantum use cases for finance, life sciences, automotive, aerospace, and more capgemini.com capgemini.com. By investing early, Capgemini aims to be a leading quantum systems integrator, helping clients prototype and eventually implement quantum solutions with a vendor-agnostic approach.

Cisco (Quantum Lab)

Cisco – The networking giant has a Cisco Quantum Lab focused on quantum internet and networking research quantumcomputingreport.com. Cisco’s quantum hardware team is developing quantum optics and photonics systems to enable secure quantum communications and distributed quantum computing quantumcomputingreport.com. Cisco envisions future networks where quantum key distribution and eventually quantum repeaters are integrated with classical infrastructure. They collaborate with universities on quantum network protocols and are exploring how to use their core routing and encryption expertise in a post-quantum world. Cisco’s quantum initiatives reflect its commitment to ensuring the next-generation internet – including quantum communication – is secure and robust.

Classiq

Classiq – An Israeli quantum software startup (founded 2020) that provides a high-level quantum algorithm design platform quantumcomputingreport.com. Classiq’s software automatically synthesizes and optimizes quantum circuits from high-level functional models, which allows developers to work at a more abstract level instead of hand-coding circuits. Essentially, Classiq is building the “quantum compiler of the future,” bringing automation to quantum software stack development quantumcomputingreport.com. The company has partnerships with major hardware providers and cloud platforms, and its tools have been used to design complex algorithms (like finance options pricing) that would be hard to craft manually. Classiq’s vision is to make quantum software development accessible to domain experts by hiding low-level circuit details quantumcomputingreport.com.

D

D-Wave Systems

D-Wave Systems – The Canadian company (founded 1999) that was the world’s first commercial quantum computing company, known for its quantum annealing systems quantumcomputingreport.com. D-Wave’s adiabatic quantum computers (currently over 5000 qubits in the Advantage system) solve optimization problems by finding low-energy states of a QUBO (quadratic unconstrained binary optimization) formulation quantumcomputingreport.com. While not gate-model quantum computers, they have been used for tasks like scheduling, protein folding, and traffic flow optimization. D-Wave also offers a full suite of software development tools and cloud access to its machines quantumcomputingreport.com. Notably, D-Wave is the only company pursuing both annealing and gate-model quantum processors in parallel quantumcomputingreport.com. In 2022, D-Wave went public and continues to iterate on its annealers while developing a gate-model roadmap.

Deloitte (Quantum Consulting)

Deloitte – One of the “Big Four” professional services firms, Deloitte has built a comprehensive quantum computing consulting practice. Deloitte offers services from quantum strategy and roadmap development to use-case identification and even implementation of quantum proofs-of-concept deloitte.com. It has published extensive research on quantum’s impact in financial services, life sciences, and supply chain management. Deloitte also partners with hardware companies and startups (e.g., an alliance with Q-CTRL for error mitigation in finance q-ctrl.com). Through its client work, Deloitte has helped banks experiment with quantum optimization for portfolio management and helped governments plan for post-quantum cryptography. The firm emphasizes being “technology agnostic” while guiding clients through the coming quantum disruption in a risk-managed way deloitte.com.

Diraq

Diraq – An Australian quantum hardware startup (University of New South Wales spin-off) developing silicon-based qubits using standard CMOS processes. Diraq’s vision is to put billions of quantum bits on a single chip by leveraging existing semiconductor fabrication techniques builtin.com. Backed by 20+ years of research and over $135M in funding, Diraq uses silicon quantum dot “spin qubits,” which have the advantage of being small and manufacturable in conventional chip factories builtin.com. The team (led by Prof. Andrew Dzurak) has demonstrated single-qubit and two-qubit logic in silicon with high fidelity. In 2023, Diraq won a DARPA project to benchmark scalable quantum platforms and announced a partnership to open a quantum chip facility in the US diraq.com. Diraq’s end-to-end approach – building full-stack hardware and control systems – could pave a faster path to practical, mass-producible quantum processors.

E

EeroQ

EeroQ – A U.S. quantum hardware startup (founded 2017) taking a unique approach by using electrons on liquid helium as qubits. EeroQ’s technique traps electrons hovering above superfluid helium and uses their spin states as qubits, aiming for long coherence and natural scalability. This method promises extremely clean qubits since electrons on helium suffer minimal disturbance gov.illinois.gov. EeroQ has made progress on controlling single electrons and recently moved its headquarters to Chicago’s new quantum hub, even securing state funding to build out its lab gov.illinois.gov. By 2025, EeroQ is working on a prototype chip integrating many electron-on-helium qubits with microwave resonator readout. If successful, EeroQ’s platform could combine benefits of trapped ions (long coherence) with those of solid-state qubits (chip-scale integration).

eleQtron

eleQtron – A German startup (founded 2020 as a spin-off from University of Siegen) building trapped-ion quantum computers with a special technique called MAGIC (Magnetic Gradient Induced Coupling) for entanglement linkedin.com. eleQtron operates quantum computing as a service, having already developed a small trapped-ion processor. Their “quantum computers from Germany” emphasize fully programmable, scalable ion-trap designs that operate at room temperature or mild cooling (as opposed to ultra-cold) eleqtron.com. In 2023, eleQtron partnered with Infineon to develop next-gen ion trap chips, planning to fabricate three improved generations of ion-trap processors for their system infineon.com. With support from the German Quantum Initiative, eleQtron aims to deliver turn-key ion-trap systems to industry and scientific users, bolstering Europe’s hardware ecosystem.

F

Fujitsu

Fujitsu – The Japanese ICT company has engaged in quantum computing on multiple fronts. While not initially a quantum hardware maker, in 2017 Fujitsu introduced the Digital Annealer, a classical hardware inspired by quantum annealing that can solve optimization problems much faster than normal computers (using quantum-adjacent algorithms) spinquanta.com. Separately, Fujitsu has now built real quantum hardware: in 2023, in collaboration with RIKEN, Fujitsu unveiled Japan’s first 64-qubit superconducting quantum computer spinquanta.com. They also developed a hybrid platform linking this 64-qubit machine with a 40-qubit simulator for integrated quantum-classical computing spinquanta.com. These milestones – a quantum-inspired annealer and a domestic superconducting QPU – position Fujitsu as a key player in Japan’s quantum ambition. Fujitsu’s research labs continue to advance quantum algorithms (e.g. for finance) and partner on quantum chemistry initiatives, leveraging the company’s extensive computing expertise.

G

Google Quantum AI

Google Quantum AI – The Quantum AI division of Google (USA) is dedicated to building a large-scale fault-tolerant quantum computer using superconducting qubits spinquanta.com. Google made headlines in 2019 by achieving quantum supremacy: their 54-qubit Sycamore processor performed a random circuit sampling task in 200 seconds that would take a supercomputer an estimated 10,000 years spinquanta.com. Since then, Google AI developed a 72-qubit “Bristlecone” and a 53-qubit “Weber”, and more recently a 70+ qubit Rainbow chip and a 105-qubit chip named Willow that demonstrated breakthroughs in quantum error correction (scaling up while exponentially reducing errors) spinquanta.com. Google also created the open-source Cirq framework for programming quantum circuits spinquanta.com. With a full stack approach (custom chips, cryo, control electronics, and software), Google’s roadmap aims for a million physical qubits by the end of the decade, focusing on error-corrected logical qubits to enable useful quantum algorithms spinquanta.com.

H

Hewlett Packard Enterprise (HPE)

HPE – The computing giant is actively integrating quantum computing with classical high-performance computing (HPC) systems. HPE has not built its own quantum computer, but it partners with quantum hardware companies to enable hybrid solutions. For example, HPE collaborated with Finnish startup IQM to demonstrate seamless integration of an on-premises quantum accelerator with an HPE supercomputer thequantuminsider.com. HPE’s Quantum Lab participates in U.S. DARPA programs to design modular “quantum supercomputers” that combine quantum processors with classical infrastructure hpe.com. Hewlett Packard Labs also conducts research on photonic computing and quantum architectures. By focusing on classical-quantum integration (unified workflows, interconnects, resource managers), HPE is positioning itself to provide the IT backbone for quantum data centers, ensuring that as quantum processors emerge, they can be deployed alongside classical servers efficiently.

Hitachi (Quantum)

Hitachi – The Japanese conglomerate has a long history in quantum research (dating back to pioneering silicon qubits in early 2000s). Currently, Hitachi is part of a major Japanese consortium (with Fujitsu and NEC) to develop a high-speed cold-atom quantum computer by 2030 quantumzeitgeist.com. The venture, guided by Japan’s Institute for Molecular Science, will use rubidium atom qubits and expects a prototype by 2026 quantumzeitgeist.com. Hitachi contributes its expertise in precision electronics and control systems to this neutral-atom approach. Additionally, Hitachi’s R&D labs explore quantum sensing and have developed quantum-inspired algorithms for finance (e.g. portfolio optimization). By teaming up with other industry leaders, Hitachi aims to ensure Japan remains competitive in delivering a commercial quantum device within the decade quantumzeitgeist.com.

Horizon Quantum Computing

Horizon Quantum Computing – A Singapore-based startup (founded 2018) creating a new generation of quantum programming tools to make quantum computing more accessible horizonquantum.com. Horizon is developing a software platform that allows developers to write programs in a classical language (similar to a “quantum C++”) which the platform then compiles into optimized quantum circuits. This could enable programmers with minimal quantum expertise to harness quantum computers. Horizon’s tools incorporate automated algorithm synthesis, resource management, and error mitigation horizonquantum.com. The company has raised funding from Tencent and other investors techcrunch.com. By focusing on the software stack and abstraction, Horizon Quantum seeks to “democratize” quantum development for industries like finance and robotics, bridging the gap between classical developers and quantum hardware.

Huawei (HiQ)

Huawei – The Chinese telecom giant has a multi-pronged quantum effort, especially in quantum communication and software. Huawei developed an open-source quantum programming framework called HiQ to facilitate algorithm design and simulation hiqsimulator.readthedocs.io. HiQ provides tools for quantum circuit construction and testing, reflecting Huawei’s aim to engage developers early. Huawei has also filed patents on quantum chips and control systems thequantuminsider.com, indicating it is researching superconducting qubit technologies. In quantum cryptography, Huawei is incorporating quantum-safe algorithms into its products to prepare for future threats huawei.com. It has demonstrated quantum key distribution in 5G networks and is exploring quantum-resistant VPNs thefastmode.com. Despite geopolitical challenges, Huawei continues to invest in quantum R&D (often quietly via its research labs) to ensure its telecom infrastructure and devices remain secure and advanced in the quantum era.

I

IBM

IBM Quantum – A pioneering force in quantum computing, IBM has built a full-stack quantum computing program and is continually breaking records in superconducting qubit technology. IBM has developed a series of ever-larger quantum processors: the 127-qubit Eagle (2021), the 433-qubit Osprey (2022), and it plans a 1,121-qubit Condor processor by 2023 spinquanta.com. These processors have steadily improved coherence times and reduced errors, setting industry benchmarks spinquanta.com. IBM also provides broad access to its quantum hardware through the IBM Quantum Experience cloud platform, cultivating a global user community spinquanta.com. Its open-source Qiskit framework has become a standard for quantum programming and education spinquanta.com. IBM’s robust roadmap includes integrating multiple chips into quantum multichip modules and achieving thousands of qubits with error correction by 2025–2030 spinquanta.com. With initiatives like the IBM Quantum Network (170+ members) and partnerships worldwide, IBM is arguably the leader in driving quantum computing from lab to practical reality, while transparently sharing progress (publishing quantum volume metrics, etc.). IBM’s contributions – from hardware to software to workforce development – are accelerating the entire field of quantum computing spinquanta.com spinquanta.com.

ID Quantique

ID Quantique (IDQ) – A Geneva-based company (founded 2001) that is the world’s leader in quantum cryptography and quantum-safe security idquantique.com thequantuminsider.com. ID Quantique was the first to commercialize quantum key distribution (QKD) systems for securing fiber-optic networks and also provides quantum random number generators (QRNGs) used in financial and government sectors thequantuminsider.com. Its QKD products (e.g., Clavis and Cerberis series) are deployed in critical infrastructure and were even part of the world’s first bank transfer using quantum encryption in 2004. IDQ also offers a range of quantum-safe network encryption appliances and works on quantum sensing (e.g. single-photon detectors). Recently, IDQ’s expertise was recognized by IonQ, which acquired the company in 2023 to integrate IDQ’s QKD and QRNG tech into IonQ’s portfolio businesswire.com. With a 20+ year legacy, ID Quantique has helped establish many of the quantum security standards and practices used today, ensuring data can be protected against quantum threats well into the future.

Infineon Technologies

Infineon – A German semiconductor manufacturer that actively participates in quantum computing projects, especially in Europe. Infineon contributes its chip fabrication know-how to several quantum hardware initiatives quantumcomputingreport.com. For example, Infineon is part of consortia developing superconducting qubit chips (GeQCoS project), trapped-ion chips (PIEDMONS project), and silicon spin qubit chips (QUASAR project) quantumcomputingreport.com. Infineon also has been a pioneer in post-quantum cryptography since 2017, helping standardize quantum-resistant encryption methods quantumcomputingreport.com. By providing custom materials and electronics (like precision control ASICs and cryoelectronics) and leading work on quantum-safe secure elements, Infineon positions itself as an essential supplier for the emerging quantum industry. In 2023, Infineon announced it will supply eleQtron with advanced ion-trap chips for their next-gen quantum computers infineon.com, reinforcing its role in quantum hardware supply chains.

Infleqtion (ColdQuanta)

Infleqtion – Formerly known as ColdQuanta, Infleqtion is a U.S. company (based in Colorado) focusing on cold-atom quantum technology spinquanta.com. It builds quantum devices that use ultracold atoms for computing, sensing, and signal processing. Infleqtion has developed a versatile cold-atom quantum computing platform and in 2022 demonstrated a 100-qubit cold atom quantum simulator. The company also produces components like vacuum cells and laser systems crucial for cold-atom research. In addition, Infleqtion acquired Super.tech (quantum software) and plans to deliver quantum RF sensors and atomic clocks. The rebrand to “Infleqtion” in 2022 signaled a push toward commercialization infleqtion.com. By 2023, Infleqtion partnered with UK’s Quantum Computing Inc. to deploy a quantum matter system in Europe infleqtion.com. With backing from venture and defense investors, Infleqtion is an emerging full-stack player leveraging ultracold matter for quantum computing and precision sensing.

Intel

Intel – The Silicon Valley semiconductor titan has a significant program to develop silicon-based quantum computing. In partnership with QuTech (Netherlands), Intel invested $50 million and engineering support over 10 years to explore silicon spin qubits fabricated in advanced CMOS processes quantumcomputingreport.com. Intel has since produced multiple generations of small quantum chips (e.g., 49-qubit Tangle Lake superconducting chip and later a 26-qubit silicon spin test chip) using its cutting-edge manufacturing. Intel also innovated in quantum control: it created a cryogenic control chip (Horse Ridge) to operate qubits at low temperatures, reducing complexity. Recognizing Moore’s Law slowing, Intel hedges on quantum as a future computing paradigm quantumcomputingreport.com. The company’s expertise in extreme-scale integration and materials puts it in a strong position to one day mass-produce qubits on silicon wafers. While Intel’s approach has been somewhat quieter than IBM or Google, it has a solid roadmap aiming for a large-scale silicon quantum processor within the decade, and it consistently publishes research on two-qubit gates and error rates in silicon.

IonQ

IonQ – A leading American quantum computing company (founded 2015) building trapped-ion quantum computers. IonQ’s systems use individual Ytterbium ion qubits suspended in vacuum and manipulated with lasers, achieving some of the highest 2-qubit gate fidelities in the industry quantumcomputingreport.com. By 2020, IonQ had built 11-qubit and 32-qubit ion trap systems accessible via the cloud. In 2021, IonQ made history by becoming the first pure-play quantum computing company to go public (NYSE: IONQ) builtin.com. IonQ’s strategy focuses on both hardware and a full software stack – their machines are available through cloud platforms like AWS Braket, Microsoft Azure, and Google Cloud quantumcomputingreport.com. The company also partners with universities (e.g., establishing the Q-Lab at University of Maryland) to foster research quantumcomputingreport.com. IonQ’s roadmap aims to deploy modular, networked ion trap systems that can scale to hundreds of qubits with all-to-all connectivity. With substantial fundraising and a series of technological milestones (IonQ demonstrated an industry-leading algorithmic qubit metric in 2022), IonQ is at the forefront of making quantum computing commercially viable.

IQM Quantum Computers

IQM – A Finnish company (founded 2018, with operations in Finland and Germany) building superconducting quantum computers for research labs and supercomputing centers meetiqm.com. IQM delivers on-premise quantum systems and specializes in a co-design approach where it tailors hardware to specific applications (like chemistry or optimization). By 2023, IQM introduced IQM Spark, a 20-qubit device, and announced IQM Radiance, a planned 54–150 qubit system for HPC integration meetiqm.com meetiqm.com. Uniquely, IQM collaborates deeply with national programs – it’s leading Finland’s project to build a 50-qubit machine and Germany’s Quantum Computer in Bavaria initiative for a 100+ qubit system. IQM also partnered with HPE to demonstrate quantum-HPC hybrid workloads thequantuminsider.com. Emphasizing European technology sovereignty, IQM controls the whole stack: chip fabrication (through VTT), cryogenics, control electronics, and software. With over €200M raised and recognition as a Quantum Unicorn, IQM is a key player advancing Europe’s hardware capability, aiming for practical quantum advantage via tightly integrated quantum-classical systems.

J

Jij Inc.

Jij Inc. – A Tokyo-based quantum software startup (founded 2018) specializing in quantum optimization solutions. Jij offers a cloud service called JijZept that allows users to solve complex optimization problems using both quantum algorithms and quantum-inspired methods qbn.world. They focus on applications like energy grid optimization, transportation logistics, and portfolio optimization. Jij’s team combines experts in mathematical optimization and quantum computing, and the company often benchmarks algorithms on real hardware as well as on Fujitsu’s Digital Annealer and D-Wave. In 2023, Jij expanded to the UK and partnered with ORCA Computing to combine its algorithm expertise with ORCA’s photonic quantum computers quantumcomputingreport.com. By providing ready-to-use tools for businesses to tap into quantum and quantum-inspired solvers, Jij is helping companies prepare for and benefit from quantum advances in optimization.

K

KETS Quantum Security

KETS Quantum – A Bristol, UK-based startup (founded 2016) developing chip-based quantum cryptography devices. KETS is known for creating integrated photonic QKD (quantum key distribution) and QRNG (quantum random number generator) modules small enough to embed in standard telecom and defense equipment. Its approach uses photonic integrated circuits to drastically shrink quantum communication hardware. In 2022, KETS completed a successful trial with BT of a miniaturized QKD system in a practical setting manufacturingmanagement.co.uk. By moving QKD from bulk optics to chips, KETS aims to make quantum-secure communication widely deployable (even in satellites or portable devices). The company has won UK government contracts and partnered with companies like Toshiba and BT on building a quantum-secure network testbed. KETS’s technology will be key to bringing quantum encryption to “last-mile” and mobile scenarios where size, weight, and power are critical.

Keysight Technologies

Keysight – A leading test and measurement company (USA) that provides essential quantum control hardware and electronics. Keysight leveraged its expertise in high-frequency electronics to develop a Quantum Control System (QCS) – a modular electronic platform that can control, synchronize, and read out dozens of qubits with low latency thequantuminsider.com. In 2023, it was announced that Keysight’s QCS will be used to power a 256-qubit superconducting quantum computer being built by Fujitsu and RIKEN, underscoring the system’s high performance thequantuminsider.com. Keysight also acquired leading quantum software firms (like Quantum Benchmark for error characterization and analysis) to complement its hardware. Additionally, Keysight introduced QuantumPRO, the first integrated electronic design automation (EDA) tool for quantum chips quantumzeitgeist.com. By providing the tools to interface quantum processors with classical computers (fast waveform generators, quantum analyzers, cryogenic control chips), Keysight plays a behind-the-scenes but critical role – it “bridges the gap” between classical and quantum realms, enabling researchers to achieve higher fidelities and scale in their experiments.

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M Squared

M Squared Lasers – A photonics and quantum technology company based in Glasgow, Scotland. M Squared provides advanced laser systems for quantum research and has expanded into building neutral-atom quantum computers. In 2022, M Squared revealed the UK’s first working commercial prototype of a neutral-atom quantum computing system (codenamed “Halcyon”), operating with arrays of cold rubidium atoms trapped and manipulated by lasers m2lasers.com. This prototype, demonstrated at the Glasgow Science Centre, was a major milestone in the UK’s quantum hardware development m2lasers.com. M Squared also developed quantum sensors (quantum gravimeters and accelerometers) using cold atoms. With strong support from UK government grants, M Squared is leveraging its laser expertise to deliver fully integrated quantum machines. Its neutral-atom platform aims to scale to useful qubit counts in coming years, complementing superconducting and ion-trap approaches. M Squared’s vision is to make quantum computing “an everyday technology”, providing turnkey systems and cloud access for industry and academia.

MagiQ Technologies

MagiQ – A U.S. company that was the first to bring a commercial QKD (quantum key distribution) product to market. In 2003, MagiQ unveiled “Navajo,” the world’s first commercial quantum cryptography system, at DEMO 2003 lightreading.com. By 2004–2006, MagiQ released successive QKD systems (QPN 5505/7505/8505) and delivered them to early adopters in government and finance en.wikipedia.org laserfocusworld.com. Originally developed for the U.S. Navy, MagiQ’s technology helped validate that quantum keys could secure data over standard telecom fibers. While QKD was still nascent, MagiQ’s efforts paved the way for today’s quantum encryption industry. The company remains active, offering specialized fiber QKD solutions and quantum random number generators. MagiQ has also participated in DARPA’s quantum network tests. As one of the quantum crypto pioneers, MagiQ’s early products and field deployments demonstrated unbreakable encryption in practice, marking a “massive leap forward for QKD” at the time laserfocusworld.com.

Microsoft (Azure Quantum)

Microsoft – Microsoft is developing a unique topological quantum computing approach while also offering the Azure Quantum cloud platform. Microsoft’s research into topological qubits (based on Majorana zero modes in superconducting nanostructures) aims to create qubits that are inherently protected from noise. In 2022, Microsoft reported evidence of Majorana quasiparticles, a step toward realizing a topological qubit. On the cloud side, Azure Quantum provides users access to diverse quantum hardware (ion traps from IonQ, superconducting qubits from Quantinuum and Rigetti, etc.) and to quantum-inspired optimization services quantumcomputingreport.com. Microsoft also developed a full quantum software stack: the Q# programming language and QDK, which integrates into Visual Studio quantumcomputingreport.com. Additionally, Microsoft introduced innovative error-correction techniques (achieving record logical qubit performance in 2023). By combining cloud services, developer tools, and fundamental research, Microsoft is ensuring it will be a major player. Their recent announcement of a “Majorana qubit” chip (dubbed Majorana 1) suggests they are making progress on hardware azure.microsoft.com. Though Microsoft’s own quantum computer is not yet operational, its holistic efforts (and massive classical resources via Azure) aim to enable a scalable, secure quantum ecosystem once topological qubits are realized.

Mitsubishi Electric (Quantum Research)

Mitsubishi Electric – This Japanese electronics company is actively researching quantum communication and computing technologies. Mitsubishi Electric has joined forces with six partners (including Toshiba and NTT) to build a national quantum secure networking testbed quantumzeitgeist.com. The company is also collaborating with a Japanese startup (NanoQT) to develop new qubit technologies using nanofiber-cavity systems – a unique approach to scalable quantum computing ainvest.com. This partnership combines Mitsubishi’s expertise in advanced electronics and photonics with NanoQT’s nanofiber quantum interface to work toward a prototype quantum computer ainvest.com. Additionally, Mitsubishi Electric Research Labs (MERL) in the US explores quantum algorithms and quantum AI for industry use cases mitsubishielectric.com. The company has also been preparing for post-quantum cryptography, ensuring its information security products (like secure PLCs for factories) use quantum-resistant algorithms mitsubishielectric.com. Overall, Mitsubishi Electric leverages its broad R&D capacity to contribute to Japan’s quantum initiative – from fundamental research to potential industrial quantum applications in the future.

Multiverse Computing

Multiverse Computing – A Spanish startup (based in San Sebastián, founded 2019) that specializes in quantum algorithms for finance and industry explodingtopics.com. Multiverse’s flagship product is Singularity, a suite of quantum and quantum-inspired algorithms delivered in a user-friendly SaaS format (including integrations like a plugin for Excel) explodingtopics.com. This allows banks and insurance firms to run complex portfolio optimization, risk analysis, and fraud detection tasks by tapping quantum techniques under the hood explodingtopics.com. The company is known for its work in quantum finance – it has collaborated with global banks (BBVA, Crédit Agricole) on use cases like credit scoring and with automotive firms on supply chain optimization. Highlighted by McKinsey and BCG as a leader in quantum finance, Multiverse raised €10M+ and in 2023 expanded to North America. It partners with multiple hardware vendors (Rigetti, D-Wave, IonQ, Pasqal) to ensure its algorithms run on whichever platform best suits the problem explodingtopics.com. By focusing on near-term business value, Multiverse is helping enterprises achieve practical quantum advantage sooner through hybrid solutions.

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NEC

NEC Corporation – A Japanese electronics company with deep roots in quantum tech research. NEC has recently been advancing a unique quantum annealing approach using its own superconducting qubit architecture (in collaboration with Austria’s ParityQC) parityqc.com. In 2020, NEC built an 8-qubit quantum annealing prototype based on the ParityQC design, demonstrating a new method for a fully connected annealer parityqc.com. NEC has also partnered with D-Wave: it invested $10 million and became the first global reseller of D-Wave’s Leap cloud service in 2020 finadium.com. Beyond annealing, NEC researches quantum network technologies and quantum security (it demonstrated quantum tokens for secure transactions in 2021). In early 2024, NEC joined forces with Fujitsu and Hitachi to launch a joint company aiming to develop a cold-atom quantum computer by 2030, pooling expertise for Japan’s quantum future quantumzeitgeist.com. With history dating back to 1999 (NEC built one of the first solid-state qubits), NEC remains a formidable contributor, from hardware prototypes to integrating quantum into enterprise solutions. Its broad vision includes not just building quantum computers but also leveraging them in telecom, AI, and security fields where NEC is a market leader.

NTT (Nippon Telegraph & Telephone)

NTT – Japan’s telecom giant is heavily involved in quantum communications, computing architecture, and networking research. NTT’s labs have worked on quantum key distribution and in 2021 set a world record for fiber QKD distance using a quantum repeater prototype. In computing, in 2023 NTT proposed a groundbreaking quantum computing architecture separating memory and processing (a “load-store” quantum computer) to improve scalability thequantuminsider.com. This approach, developed with RIKEN, envisions a network of quantum memory modules connected to quantum processing units, analogous to classical computer architecture thequantuminsider.com. NTT has also developed an optical fiber quantum networking testbed (the INQNET alliance with Caltech) focusing on quantum repeaters and interconnects quantumcomputingreport.com. Additionally, NTT Research operates a Quantum Physics & Computing lab in Silicon Valley working on theoretical foundations like quantum neural networks. With projects ranging from quantum servers and middleware to QKD services for 5G networks, NTT is preparing its global infrastructure for integration with quantum technologies. The company predicts a convergence of HPC, cloud, edge, and quantum computing within the next decade theregister.com, and through strategic investments and research (including investing in startups like PsiQuantum), NTT aims to be at the forefront of that convergence.

NVIDIA

NVIDIA – Renowned for GPUs and AI, NVIDIA is also driving innovation in quantum software and hybrid quantum-classical computing. In March 2025, NVIDIA announced the creation of the NVIDIA Accelerated Quantum Research Center (NVAQC) in Boston to develop quantum computing architectures and algorithms that integrate tightly with AI supercomputers spinquanta.com spinquanta.com. NVIDIA’s strategy is to leverage its strength in GPUs to enhance quantum research: it released cuQuantum, an SDK with libraries (cuStateVec, cuTensorNet) that enable GPU-accelerated simulation of quantum circuits spinquanta.com. This allows researchers to simulate hundreds of qubits on classical supercomputers, speeding up algorithm design and verification spinquanta.com. NVIDIA also introduced the NVIDIA Quantum Optimized Device Architecture (QODA) – a platform for programming quantum and classical resources together. Moreover, NVIDIA is partnering with quantum hardware companies (e.g., a project with IBM and Google on error correction simulation). By providing a robust software stack and HPC infrastructure (like linking GPUs with quantum processors), NVIDIA plays a bridging role: helping solve near-term problems via quantum-inspired classical computing and preparing workflows for future quantum acceleration spinquanta.com spinquanta.com. The company’s investment in a quantum research center and its inclusion of quantum in its HPC conferences underscore that NVIDIA views quantum computing as a natural extension of high-performance computing, where GPUs and QPUs work side by side.

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Orca Computing

ORCA Computing – A London-based startup (founded 2019) building photonic quantum computers that operate at room temperature using single photons in optical fiber. ORCA’s approach uses quantum memory fibers and integrated photonic circuits to perform quantum processing without the need for cryogenics. In 2022, ORCA made headlines by delivering the first quantum computer to the UK’s Ministry of Defence (MoD) – a small photonic system called ORCA PT-1 orcacomputing.com. This marked the first operational quantum computer deployed on-premises within a government department, used to explore machine learning and optimization problems orcacomputing.com. ORCA’s photonic platform is modular and can be easily scaled by extending fiber networks. They also focus on a unique model called “continuous variable” quantum computing which can interface with telecom networks. ORCA has raised significant funds (including a $15M Series A) and has partnerships for integrating its tech with high-performance computing environments setsquared.co.uk. With the launch of its 12-qubit photonic computer Belenos via the cloud quantumcomputingreport.com, ORCA is demonstrating that photonic qubits are becoming competitive. ORCA’s vision of compact, ambient-condition quantum processors could open up quantum computing to many new deployment scenarios (like in data centers, military outposts, or even vehicles) much sooner than other platforms allow.

Origin Quantum

Origin Quantum (Origin Quantum Computing Technology) – A leading Chinese quantum computing startup (based in Hefei, founded 2017) pursuing a full-stack approach. Origin Quantum has built several superconducting quantum chips (with names like “Wuyuan” and “Zu Chongzhi”) and in 2020 launched a 6-qubit superconducting prototype online. Uniquely, the company also developed its own control system: in 2022, Origin released the Tianji 4.0 quantum control system, which can reportedly support 1,000 qubits, marking a significant step toward scalable quantum computer operations in China thequantuminsider.com. Origin established quantum chip fabrication labs and assembly lines, achieving a domestic supply chain for qubit production stdaily.com. It has also created software platforms (OriginQ Cloud and QPanda SDK) to grow China’s developer community. Recently, Origin Quantum partnered with telecommunications providers to offer cloud access to its superconducting QPU thequantuminsider.com. Often called China’s first dedicated quantum computing firm, Origin Quantum is at the forefront of China’s push to catch up to US advances. With strong backing from the Anhui provincial government and Chinese Academy of Sciences, Origin aims to deliver a 24-qubit superconducting computer and a practical quantum utility within a few years thequantuminsider.com.

Oxford Ionics

Oxford Ionics – A UK-based quantum computing startup (founded 2019) developing high-performance trapped-ion quantum processors that can be integrated into conventional semiconductor chips. Oxford Ionics uses a proprietary approach called Electronic Qubit Control (EQC) – essentially, trapping ions in standard silicon chips and using microwave signals (rather than fragile lasers) for control oxionics.com. This promises the superb fidelity of trapped ions combined with the scalability of semiconductor fabrication oxionics.com. The company has demonstrated one of the highest two-qubit gate fidelities recorded for any platform (99.99995%) using microwave control. In 2023, Oxford Ionics won a £6M contract to supply a quantum computing module to the UK’s National Quantum Computing Centre, highlighting the government’s confidence in its tech oxionics.com. Later that year, IonQ (USA) announced it would acquire Oxford Ionics for $1.1 billion – a testament to the company’s potential oxionics.com. Oxford Ionics’ innovation lies in marrying ion-trap stability with chip-scale integration, potentially removing many obstacles to scaling up trapped-ion systems (like bulky optics). If successful, their approach could lead to modular, rack-mounted ion trap quantum computers that leverage existing chip foundries and integrate with conventional electronics more seamlessly.

Oxford Quantum Circuits (OQC)

Oxford Quantum Circuits – A UK-based company (spun out of University of Oxford in 2017) operating the country’s first commercially available superconducting quantum computer. OQC’s unique 3D coaxial resonator architecture (the “Coaxmon” qubit) offers improved coherence and scalability over planar designs. In mid-2022, OQC deployed “Lucy”, an 8-qubit quantum processor, to the AWS Braket cloud – making it Europe’s first quantum hardware on a major cloud platform oqc.tech. OQC’s mission is to take quantum “out of the lab” and make it enterprise-ready oqc.tech. The company has since developed a 16-qubit chip (Toshiko) and provides private quantum access to clients via data center integration oqc.tech. With a £38M Series A raise, OQC opened one of the UK’s largest quantum facilities and expanded to Japan. They emphasize full-stack delivery: OQC designs and fabricates qubits, builds the cryogenic systems, and offers a cloud service for end-users. Their Quantum Computing as a Service (QCaaS) platform allows customers to either use OQC’s cloud or even install OQC’s system on-premises. By focusing on enterprise-ready quantum solutions (high uptime, robust operations, easy cloud integration), OQC is positioning itself as Europe’s answer to the big US quantum providers.

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ParityQC

ParityQC – An Austrian startup (founded 2019) that specializes in quantum computer architectures and blueprints. ParityQC (short for Parity Quantum Computing) doesn’t build quantum computers itself but provides a unique algorithmic architecture – the ParityQC Architecture – which maps optimization problems to quantum hardware in a way that reduces error sensitivity. Notably, NEC used ParityQC’s architecture to implement an 8-qubit quantum annealer, demonstrating the approach’s practicality parityqc.com. ParityQC’s designs can be applied to different hardware (superconducting, trapped ions, etc.) and have been adopted by projects in Germany and Japan for building next-gen annealers and error-corrected systems. They offer a ParityOS for compiling problems to their architecture. By providing a systematic way to lay out qubits and interactions, ParityQC helps hardware companies maximize performance and scalability. For example, their collaboration with NEC achieved an annealing scheme that is fully connected but uses far fewer couplers than naive designs parityqc.com. As the only company with a hardware-agnostic quantum chip blueprint, ParityQC plays a quiet but important role in guiding how future quantum chips (especially annealers and NISQ optimizers) are built and programmed.

PASQAL

Pasqal – A French quantum computing company (Paris, founded 2019) building neutral-atom quantum computers. Pasqal’s devices trap arrays of cold neutral atoms (typically rubidium) in configurable 2D and 3D patterns using laser tweezers. Out of a prestigious research lineage (Institut d’Optique), Pasqal has scaled its systems to 100+ atomic qubits and targets 1000 within a few years explodingtopics.com. The company’s neutral-atom platform operates at relatively high temperatures (millikelvin vs microkelvin for ions) and boasts full connectivity among qubits via Rydberg blockade interactions. Pasqal’s team of ~50 quantum engineers received early validation when the French government’s Defense Innovation Fund invested, making Pasqal one of the fund’s first recipients explodingtopics.com. In 2023, Pasqal merged with UK’s Qu&Co, expanding its quantum algorithms portfolio (especially in chemistry and PDE solvers). Pasqal has also partnered with industry leaders (BMW for materials discovery, Crédit Agricole for finance). By leveraging France’s excellence in cold-atom physics, Pasqal became Europe’s first quantum hardware startup to deliver a programmable 100-qubit quantum simulator. Its roadmap foresees fault-tolerant quantum computing via error mitigation on these highly scalable neutral-atom processors explodingtopics.com.

Phasecraft

Phasecraft – A UK quantum software company (founded 2019 by quantum computing professors from UCL and Bristol) focused on quantum algorithms and software for near-term devices. Phasecraft is known for its work on improving quantum algorithms for materials science, energy, and cryptography. For example, in 2020 Phasecraft achieved a record simulation of material properties on a small quantum computer by optimizing the algorithm’s depth. Phasecraft has partnerships with Google, IBM, and Rigetti – allowing it to test its algorithms on cutting-edge hardware phasecraft.io. They have significantly reduced the qubit and gate requirements for important problems like battery chemistry simulations and Quantum Approximate Optimization Algorithm (QAOA) performance. With ~$5M seed funding and backing from the UK government, Phasecraft is one of the only startups exclusively targeting the algorithm layer, bringing in advanced theoretical techniques to wring the most out of today’s noisy qubits. By bridging the gap between academic quantum science and practical industrial use, Phasecraft aims to be the go-to team for delivering early quantum advantage in applications like materials design and energy optimization, working closely with hardware advances to co-design efficient solutions phasecraft.io.

ProteinQure

ProteinQure – A Canadian startup (Toronto, founded 2017) applying quantum computing to drug discovery and protein design quantumcomputingreport.com. ProteinQure uses a hybrid approach combining classical molecular simulations, machine learning, and quantum computing to engineer novel peptide drugs quantumcomputingreport.com. Its platform can model how proteins fold and bind at an atomic level, tasks which are extremely complex for classical computers. ProteinQure has collaborated with biotech companies to evaluate how quantum algorithms (like variational quantum eigensolvers) might speed up finding candidate molecules. The team, which includes computational biologists and quantum chemists, has published research on using D-Wave’s annealer for protein folding. They also integrate with IBM Q and Rigetti for small-scale chemistry problems. By 2025, ProteinQure has demonstrated the design of exotic peptide therapeutics using its in-house software, showcasing how quantum-enabled simulations plus AI can potentially shorten the drug development cycle quantumcomputingreport.com. This approach delivered peptide leads for previously “undruggable” disease targets. As pharma giants begin exploring quantum computing, ProteinQure stands out as an early mover providing quantum-driven R&D tools in the life sciences domain quantumcomputingreport.com.

PsiQuantum

PsiQuantum – A Silicon Valley and UK-based company (founded 2016) ambitiously working to build a large-scale photonic quantum computer with one million qubits. PsiQuantum’s approach uses single photons traveling through silicon photonic circuits as qubits, with specialized detectors and integrated circuits for entangling and measuring the photons. The company has kept a low media profile but has raised over $650M (including a notable $150M from BlackRock in 2021) and partnered with GlobalFoundries to manufacture its chips. PsiQuantum’s goal is a fault-tolerant machine capable of solving useful problems – such as simulating new materials or chemicals – by around 2025–2030 spinquanta.com. They have already demonstrated key building blocks: high-quality single-photon sources, photonic integrated chips, and a novel error-correction scheme suited for photonic qubits. By leveraging existing semiconductor manufacturing for its photonic chips, PsiQuantum believes it can leapfrog more bespoke approaches in scaling qubit count spinquanta.com. The company’s founders (quantum optics experts from Bristol and Caltech) emphasize that only a million-qubit level machine can deliver true quantum advantage in many problems, and PsiQuantum’s all-in bet on photonics is one of the boldest attempts to get there. If successful, they foresee applications ranging from climate modeling to solving the hardest chemistry challenges.

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Q-CTRL

Q-CTRL – An Australian company (founded 2017) specializing in quantum control engineering and error reduction tools explodingtopics.com. Q-CTRL provides software (and now also hardware) solutions to stabilize qubits and improve their performance – essentially “quantum firmware” that sits between the hardware and algorithms. Their flagship product, BOULDER Opal, allows automated optimization of control pulses to suppress noise and errors in quantum operations explodingtopics.com. Q-CTRL’s philosophy follows the adage “selling shovels during a gold rush”, focusing on solving practical instability issues that all quantum hardware faces rather than building a computer themselves explodingtopics.com. They’ve demonstrated 10–100× improvements in fidelity on IBM and Rigetti devices using their pulse shaping techniques. Q-CTRL also offers Black Opal, a training tool to learn quantum control. With a global presence (offices in Los Angeles and Berlin) and partnerships across the industry (e.g., with IBM, Capgemini, and end-users like the Australian Army), Q-CTRL is recognized as a leader in quantum error mitigation. In 2023, it released Fire Opal, a cloud-based library for error-robust quantum algorithms, and even ventured into quantum sensing (contracted by DARPA to develop navigation sensors). By boosting algorithm success rates on today’s hardware, Q-CTRL’s control solutions are accelerating the timeline for achieving useful quantum computations despite hardware noise explodingtopics.com.

Qblox

Qblox – A Dutch company (Delft, founded 2019) developing modular, scalable control electronics for quantum computers. Qblox builds compact electronic modules that can generate microwave pulses, analog waveforms, and perform qubit readout with high precision and timing synchronization – all crucial to operate 50+ qubit systems. Their flagship Cluster platform can control and read out dozens of qubits per unit and is designed to daisy-chain for larger systems qphox.eu. Qblox’s hardware has been adopted by many quantum labs and startups worldwide for controlling superconducting, spin, and ion-trap qubits. For instance, in 2022 Qblox collaborated with QphoX and Rigetti on demonstrating optical readout techniques for superconducting qubits investors.rigetti.com. By providing ready-to-use, FPGA-based control stacks, Qblox significantly shortens the time for new quantum setups to get running and ensures stable operation. They also incorporate feedback and fast data processing enabling error correction experiments. With support from the European Quantum Flagship, Qblox continuously improves integration (e.g., adding cryogenic-compatible control for spin qubits). In summary, Qblox delivers the “nervous system” of a quantum computer – signal generation and acquisition – in a user-friendly, scalable form, which is essential for the community to progress toward quantum advantage.

QC Ware

QC Ware – A U.S. company (Silicon Valley, founded 2014) offering Quantum-as-a-Service software and consulting for enterprises spinquanta.com. QC Ware develops algorithms in areas like chemistry simulation, machine learning, and optimization, and provides a platform (Forge) where clients can run these algorithms on various quantum backends (or classical simulators) via the cloud. Their team of quantum scientists works closely with industry partners to identify use cases that can yield near-term benefits. QC Ware has pioneered techniques in quantum machine learning (e.g. quantum data classification) and quantum-ready optimization. For example, they created algorithms for Airbus to speed up materials design and for Goldman Sachs to price financial derivatives on future quantum hardware. QC Ware’s Forge platform simplifies trying these algorithms – users can call high-level functions without deep quantum expertise spinquanta.com. Beyond software, QC Ware also runs an annual Q2B conference, one of the largest gatherings bridging industry and quantum tech. By acting as a bridge between end-users and quantum hardware, QC Ware helps companies prepare for and exploit quantum advances, offering them a “one-stop shop” to experiment with cutting-edge quantum techniques (from D-Wave’s annealer to gate-model devices) for their specific business problems spinquanta.com.

QNu Labs

QNu Labs – An Indian company (Bengaluru, founded 2016) that is the country’s first provider of commercial quantum cryptography products en.wikipedia.org. QNu Labs offers a suite of quantum-safe security solutions, including quantum key distribution (QKD) systems, a high-speed quantum random number generator (QRNG) called “Archer”, and applications like a quantum-safe VPN and secure messaging platform builtin.com builtin.com. QNu’s flagship product “Tropos” QKD has been successfully tested by India’s defense forces (Army and Navy) and government labs builtin.com. They also introduced Entropy-as-a-Service (EaaS) via their “Qosmos” platform, allowing customers to fetch true quantum randomness from the cloud builtin.com. QNu Labs has notable partnerships with ISRO (for satellite QKD) and with academia to develop next-gen quantum cryptographic protocols. By 2023, QNu secured significant funding under India’s National Quantum Mission to scale its tech. As nations gear up for threats to classical encryption, QNu Labs has positioned India as a global contributor in quantum-safe security, delivering end-to-end solutions (hardware devices plus management software) that ensure data confidentiality even against quantum attackers builtin.com.

QphoX

QphoX – A Delft, Netherlands-based startup (founded 2019) developing a “quantum modem” – a device to interconnect quantum processors using light. QphoX’s technology performs microwave-to-optical conversion of quantum signals, allowing superconducting or spin qubits (which operate with microwave photons) to interface with optical fiber networks for long-distance quantum communication qphox.eu. This quantum transduction is key to building distributed quantum computers and the quantum internet. In 2022, QphoX raised €2M after it demonstrated a prototype microwave-optical transducer with promising efficiency qphox.eu. The company also collaborates with Rigetti Computing and the UK’s NQCC on an optical readout project for superconducting qubits investors.rigetti.com. By integrating quantum nodes via optical links, QphoX aims to enable modular scaling of quantum computers (linking many smaller processors into a larger one) and to connect superconducting qubits – which normally are trapped in a cryostat – to room-temperature photonic networks. Their Quantum Modem could thus unlock both quantum computing at scale and secure quantum networks by converting qubit states to telecom C-band photons suitable for fiber transmission qphox.eu. If successful, QphoX’s innovation will be a cornerstone technology for the quantum internet, analogous to how classical modems connected computers over long distances.

Qrypt

Qrypt – A U.S. cybersecurity startup delivering quantum-secure encryption solutions through a unique approach to key generation. Qrypt’s platform combines multiple entropy sources (including quantum random number generators) to allow two parties to independently generate identical one-time pad keys, eliminating the need to ever transmit the key cybersecurity-excellence-awards.com. This method, based on work with Los Alamos National Lab, is called Quantum Entropy-as-a-Service – each party pulls down high-quality random data from Qrypt’s cloud, and Qrypt’s algorithms ensure their keys match without exposure cybersecurity-excellence-awards.com. The resulting encryption keys are truly random and extremely large (megabits), enabling unbreakable one-time pad encryption for securing data “for eternity.” Qrypt has also developed its own QRNG hardware in the US to feed its service businesswire.com. In 2022, Qrypt partnered with Thales to integrate its quantum entropy into Thales’ hardware security modules cybersecurity-excellence-awards.com. Qrypt markets this as future-proof encryption that can safeguard sensitive data against not only quantum computers but any computational advancements. With rising concern over “harvest now, decrypt later” attacks, Qrypt’s on-demand quantum key generation ensures that even if data is recorded today, it remains safe because the keys can be made available only at the moment of use and are never reused cybersecurity-excellence-awards.com. In essence, Qrypt delivers quantum-grade security using software APIs, making adoption seamless for organizations looking to upgrade their cryptography ahead of the quantum threat.

Quandela

Quandela – A French quantum computing startup (founded 2017) focused on photonic quantum computers and networks. Quandela manufactures sources of single photons – its proprietary semiconductor quantum dot devices can emit highly indistinguishable single photons on demand, a crucial resource for photonic qubits quandela.com. In 2022, Quandela launched “MosaiQ,” a 2-qubit photonic quantum processor, and has since scaled to a 6-photon, then 12-photon, device named Belénos datacenterdynamics.com quantumcomputingreport.com. Belénos, announced in 2023, is accessible via the cloud and touted as the most powerful photonic quantum computer available at launch quandela.com quantumcomputingreport.com. Quandela also offers a software suite (Perceval) for designing and simulating photonic circuits. They achieved a landmark in 2021 by demonstrating a key algorithm (boson sampling) with 6 photons. On the networking side, Quandela’s single-photon sources and integrated optics contribute to European quantum communication pilots. The company raised €50M in 2022 to build a photonic qubit factory and develop a fault-tolerant photonic architecture sifted.eu. By using photons (which operate at room temperature and can travel through fiber), Quandela aims to create modular quantum processors that easily network together. Their progress underscores that photonics is a serious contender in the race for scalable quantum computing, and Quandela leads Europe in this domain with its full-stack approach (photonic hardware + software) quandela.com.

Quantinuum

Quantinuum – Formed by the 2021 merger of Honeywell Quantum Solutions (USA) and Cambridge Quantum (UK), Quantinuum is one of the world’s largest integrated quantum computing companies spinquanta.com. On the hardware side, it continues Honeywell’s development of trapped-ion quantum computers that feature industry-leading qubit quality and mid-circuit measurement capabilities. Honeywell’s devices (H0 to H2) achieved record quantum volume and set benchmarks for low error rates. On the software side, Quantinuum incorporates Cambridge Quantum’s expertise in quantum algorithms, notably in chemistry (their TKET software and OSP suite) and cybersecurity (they created a certified quantum random number generator). The combined company has about 450 employees. Notable milestones include Quantinuum’s H1-1 system reaching quantum volume 1024 in 2022 (first four-digit score), and the release of InQuanto, a quantum chemistry package leveraging their hardware. Quantinuum also launched one of the first commercial quantum cybersecurity products – Quantum Origin, a QRNG-based key generator. By uniting hardware and software, Quantinuum can tightly co-optimize them: for example, using its logical qubit capabilities to run better algorithms from the software team. The company’s near-term goal is to implement quantum error correction on its ion traps, while its long-term aim is a fault-tolerant trapped-ion architecture with fully connected modules. With backing from Honeywell and major investors, Quantinuum is unique as a transatlantic quantum powerhouse bridging high-end hardware, middleware, and applications under one roof spinquanta.com.

Quantum Brilliance

Quantum Brilliance – An Australian-German startup (founded 2019) developing diamond-based quantum microprocessors designed to work at room temperature. Quantum Brilliance uses synthetic diamond NV-centers (nitrogen-vacancy centers) as qubits, a platform that doesn’t require cryogenics or complex laser cooling qbn.world. Their vision is to create portable quantum accelerators – essentially quantum co-processors – that can be deployed in server racks, satellites, or even mobile devices. In 2021, they delivered the world’s first room-temperature quantum computing prototype (a 2-qubit diamond system) to a supercomputing center in Germany quantumcomputingreport.com. While small in qubit count now, these devices are very compact and do not need special infrastructure. Quantum Brilliance has a roadmap to achieve 50 qubits by 2025 by leveraging improvements in fabrication and error mitigation. They also raised $20M in 2022 to establish the first diamond quantum fabrication facility in Australia thequantuminsider.com. The key advantage of Quantum Brilliance’s approach is extreme robustness and low power – their qubits operate at ambient conditions, enabling quantum computing to eventually run wherever classical computing runs, without dilution fridges qbn.world. Though still in early stages, they have begun integrating their units into HPC clusters to test hybrid algorithms. If successful, Quantum Brilliance could democratize quantum computing by shrinking it from lab equipment to something as ubiquitous as a GPU card, making “quantum accelerators” available to a much broader range of users and environments qbn.world.

Quantum Circuits Inc. (QCI)

Quantum Circuits Inc. – A New Haven, Connecticut startup (founded 2015 by Yale professors) developing superconducting quantum computers with a focus on modularity and error correction. QCI’s founding team (including Robert Schoelkopf and Michel Devoret) are pioneers of the transmon qubit and invented the quantum circuit approach to superconducting qubits. QCI is notable for pursuing a “dual rail cavity” architecture – using pairs of microwave cavities as logical qubits with built-in error detection quantumcircuits.com. This is designed to create inherently more stable qubits. QCI has built a state-of-the-art fab and in 2020 reportedly tested a prototype of their small quantum processor with high coherence. They also offer a cloud service called QCConnect. In 2022, QCI partnered with AWS to provide a custom cryogenic control stack for AWS’s quantum program. While details are scarce, QCI’s long-coherence superconducting circuits and Yale pedigree suggest they’re working toward a truly fault-tolerant design quantumcomputingreport.com. The company has raised over $18M. QCI’s differentiated approach (cavity qubits with naturally longer lifetimes than transmons) could allow them to perform algorithms with fewer error corrections. They are one of the few U.S. startups in superconducting qubits (a space otherwise dominated by giants like IBM and Rigetti), and their deep expertise gives them a competitive edge in tackling the hardest challenges of scaling and stabilizing quantum processors quantumcomputingreport.com.

Quantum Computing Inc. (QCi, QUBT)

Quantum Computing Inc. – A U.S. company (Leesburg, VA) that provides quantum-inspired and quantum software solutions and is now venturing into photonic quantum hardware. QCi started around 2018 focusing on software for formulating and solving problems on quantum annealers and other platforms. They launched Qatalyst, a software that allows users to input optimization problems and run them on D-Wave or classical solvers without needing quantum programming expertise. In 2022, QCi made a bold move by acquiring QPhoton, a startup building room-temperature photonic quantum computing devices (using patented nanophotonic technology) spinquanta.com. With this, QCi is developing its own small-scale photonic quantum systems aimed at tasks like imaging and sensing, under the product line “Dirac” and “Entanglement Generation Modules.” One notable achievement: in 2023 QCi announced it had integrated its photonic quantum information source with a classical ML system to demonstrate a quantum-accelerated imaging solution. Essentially, QCi is evolving into an end-to-end quantum company: it offers ready-to-run quantum applications (in finance, logistics, etc.) and also is creating accessible hardware that can perform certain computations at high speed via photonics spinquanta.com. As a publicly traded company (Nasdaq: QUBT), QCi has to show rapid progress – and it has been active in partnerships, e.g. with Splunk on cybersecurity. While smaller than many peers, QCi’s software-first approach, combined with a foray into novel photonic processors, exemplifies a startup trying multiple angles to bring quantum benefits to customers sooner spinquanta.com.

Quantum Machines

Quantum Machines – An Israeli startup (founded 2018) that developed the Quantum Orchestration Platform, a universal hardware control system for quantum computers explodingtopics.com. Quantum Machines’ flagship product is the OPX, an FPGA-based control unit with a dedicated programming language (Qua) for flexibly generating pulses, reading qubit states, and performing real-time feedback. The OPX can interface with superconducting, trapped-ion, and other qubit types, coordinating the “interplay between hardware and software for maximum performance” explodingtopics.com. By 2022, Quantum Machines’ controllers were used by dozens of leading labs and startups globally, effectively becoming a de facto standard for many new quantum setups. The company also introduced QUA cloud – allowing remote users to leverage its control hardware via cloud. In 2022, they raised $50M (total ~$75M Series B) and partnered with Israel’s quantum computing center to deliver a full control stack. Quantum Machines has also rolled out advanced features: multi-qubit gated control, integrated error mitigation routines, and compatibility with Google’s Cirq and IBM’s Qiskit. Their Pulse Processor concept frees researchers from building custom electronics, letting them program at a high level and rely on QM’s platform to translate into precise timing and waveform operations. As a result, labs using QM’s system have significantly cut down experiment development time and implemented complex protocols (like multi-qubit calibrated gates and error correction cycles) that would be daunting otherwise explodingtopics.com. In essence, Quantum Machines provides the classical brain and nervous system for quantum computers, enabling real-time decision-making and fast classical-quantum feedback, which are crucial for algorithms like error correction and adaptive circuits explodingtopics.com.

Quantum Motion

Quantum Motion – A UK startup (London, founded 2017) developing silicon-based quantum processors using standard CMOS manufacturing. Spin-out of UCL and Oxford, Quantum Motion’s approach is to create qubits from the spins of single electrons trapped in silicon transistor-like structures, with the ultimate goal of leveraging existing chip fabs to produce millions of qubits on a chip quantummotion.tech. In 2020, they set a benchmark by operating a large array of quantum dots in a silicon chip (a step toward a dense 2D qubit grid). By 2022, Quantum Motion demonstrated one of the most advanced silicon spin qubit arrays and set a record for measuring over 1000 quantum dots in minutes using automated techniques x.com. They also won a contract in 2024 from the UK’s NQCC to deliver a “quantum processor testbed” with a few dozen silicon qubits x.com. Quantum Motion’s team includes leaders of the 2012 Nobel-winning work on quantum optics and CMOS experts. Their innovative “Bloomsbury” chip used commercially fabricated structures to host an array of spin qubits, showing the viability of using standard processes quantummotion.tech. While still early in qubit count, the fact that their qubits are made in the same foundries as classical processors is promising for scaling. Quantum Motion’s goal is a architecture where qubits, control electronics, and memory all reside on a silicon platform, enabling fast local control and readout. By riding on the shoulders of the trillion-dollar semiconductor industry, Quantum Motion hopes to make quantum chips that piggyback on Moore’s Law, potentially scaling to large numbers at lower cost and with easier integration into classical systems quantummotion.tech.

Quantum South

Quantum-South – A startup from Uruguay (founded 2019) specializing in applying quantum computing to cargo optimization and logistics problems quantum-south.com. Quantum South focuses on the airline and maritime industries, tackling complex load optimization challenges such as how to pack air cargo or ship containers most efficiently while respecting constraints (balance, weight, priority, etc.) quantum-south.com. They have developed formulations of these problems that run on both current quantum annealers and gate-model devices. For instance, Quantum South demonstrated an optimization of unit load device (ULD) packing for air cargo on D-Wave’s annealer that could improve loading efficiency. They also worked on quantum approaches to optimize cargo placement on passenger aircraft (balancing the plane) and even scheduling tasks in ports. By using quantum algorithms (QAOA, annealing, etc.), they aim for better solutions than classical heuristics in this highly combinatorial domain. Quantum South often collaborates with LATAM Airlines and other Latin American companies for pilot projects. Though a small company, it stands out by providing quantum solutions in a region (South America) with emerging quantum activity and by targeting a niche – cargo logistics – that is vital to global trade. Their work exemplifies how quantum computing can impact operations research and supply chain management in the near future by finding more optimal configurations that save time and cost for transport companies quantum-south.com.

Quantum Xchange

Quantum Xchange – A U.S. firm (based in Maryland, founded 2018) that initially built a fiber optic quantum key distribution network on the U.S. East Coast and has since evolved to offer a more software-centric quantum-safe key delivery platform. In 2019, Quantum Xchange launched “Phio” – a QKD service connecting NYC to DC via leased fiber. However, recognizing deployment challenges, by 2021 the company pivoted away from strictly QKD hardware to a hybrid key distribution system (Phio TX) that can manage keys from both quantum and classical sources quantumxc.com. Their platform allows organizations to incorporate quantum-generated keys (from QRNGs or QKD) alongside conventional keys, creating an extra layer of security without requiring new fiber infrastructure quantumxc.com. Essentially, Quantum Xchange now provides a “Quantum-Secure Layer” that works over existing networks to distribute encryption keys, using out-of-band transmission and quantum-safe algorithms to mitigate man-in-the-middle risk quantumxc.com. For example, they partnered with Thales so that Phio TX can inject quantum keys into Thales hardware security modules. The company’s earlier achievement included powering the first commercial QKD trial network in the U.S. (with Toshiba). By shifting to a more practical approach (augmented key distribution that’s backward-compatible), Quantum Xchange is helping enterprises transition to quantum-safe security incrementally. It highlights that flexibility in architecture – mixing quantum and post-quantum techniques – can make adoption of quantum security more feasible quantumxc.com.

QuantumCTek

QuantumCTek – China’s first public company (SHA: 688027) focused on quantum communication and encryption equipment. QuantumCTek (also written Quantum C Tek) is based in Hefei and has been a key provider of QKD systems for China’s national quantum-secured fiber network quantum-info.com. The company manufactures a range of QKD products (for metro distances, long-distance with trusted relays, and satellite QKD terminals) and quantum-safe network encryptors. QuantumCTek played a major role in China’s 2,000-km Beijing-Shanghai quantum backbone, supplying QKD devices at dozens of nodes globaltimes.cn. In 2020, QuantumCTek listed on the STAR Market, becoming one of the first quantum tech IPOs globally. Despite U.S. trade sanctions in 2021, the company has continued to innovate – in 2022 it announced a prototype 1000-qubit superconducting chip in development globaltimes.cn (as it also explores quantum computing). But its core business remains quantum security: QuantumCTek is a world leader in deployed QKD systems, and is also developing compact QKD for mobile, quantum secure direct communication schemes, and quantum random number generators quantum-info.com. With China’s government investing heavily in quantum infrastructure (e.g., the QUESS satellite and city networks), QuantumCTek enjoys strong domestic demand. It has also exported QKD devices to Europe for research collaborations. By having end-to-end control of manufacturing, QuantumCTek ensures its products meet high security standards – an important factor as quantum communication is integrated into critical infrastructure. Essentially, QuantumCTek has positioned itself as the Huawei of quantum communication, dominating its home market and aiming to expand globally as more countries adopt quantum-safe networking quantum-info.com.

QuantWare

QuantWare – A Dutch startup (Delft, founded 2020) manufacturing superconducting quantum processors and related hardware for research labs and companies quantware.com. Often compared to the role of GPU makers in classical computing, QuantWare seeks to become the provider of off-the-shelf quantum processing units (QPUs). In 2021, QuantWare began selling 5-qubit and QPU chips (named Soprano and Mezzo), and by 2022 it could deliver a 25-qubit processor – making it one of the first to offer commercial superconducting chips outside the big firms quantware.com. QuantWare leverages a unique scalable resonator design to maintain signal quality as qubit counts increase. They also partner with companies like SeeQC for integrated chip development businesswire.com. In addition to qubit chips, QuantWare provides components like traveling-wave parametric amplifiers (TWPA) for reading qubits, having launched a high-performing TWPA called Crescendo in 2023 quantware.com. By selling customizable qubit arrays, QuantWare dramatically lowers the barrier for new quantum efforts – customers can focus on software or system integration without investing in a full nano-fabrication line. QuantWare’s vision is “quantum ASICs”: design and fab qubit chips tailored to specific needs (number of qubits, connectivity) in a matter of months, using standardized processes quantware.com. This enables rapid iteration and experimentation in the community. With €7M raised, QuantWare is expanding production and already counts several quantum computing startups and national labs as clients. By commoditizing the qubit layer, QuantWare could accelerate the proliferation of superconducting quantum systems globally, similar to how classical computing exploded once third-party chip suppliers emerged quantware.com.

Qubitekk

Qubitekk – A California-based company (founded 2012) building quantum networking components and systems, such as entangled photon sources and QKD devices, primarily for industrial and defense applications. Qubitekk developed entanglement sources that can distribute entangled photon pairs across fiber for quantum key distribution or sensing. They have been involved in notable projects: in 2020 Qubitekk provided equipment for the U.S. Electric Power Research Institute’s test of quantum encryption on the power grid, helping secure control signals with QKD. They also partnered with the U.S. Navy on ship-to-ship QKD trials. In 2023, Qubitekk’s significance rose when IonQ announced it was acquiring Qubitekk to enhance IonQ’s quantum networking capabilities quantumcomputingreport.com. This followed Qubitekk’s award of a Stage 1 DARPA contract to develop modular quantum networks for DARPA’s quantum benchmarking program iqmp.org. Qubitekk’s quantum entanglement sources are among the first certified for use outside labs (they’re robust and user-friendly), and they sell a Quantum Entangled Photons Generator (QEPG) as a turnkey product. By combining with IonQ, there’s now a path to integrate Qubitekk’s entanglement distribution tech with IonQ’s trapped-ion systems, potentially enabling distributed quantum computing. In summary, Qubitekk has been a pioneer in practical quantum networking, and its products help bridge the gap between quantum experiments and real-world deployment by bringing quantum communications to sectors like energy and defense in a plug-and-play manner.

QuEra Computing

QuEra Computing – A Boston-based quantum computing startup (founded 2019) building neutral-atom quantum computers with a focus on scalability via Rydberg interactions. QuEra emerged from Harvard and MIT research that demonstrated 256-atom quantum simulators, the largest of their kind, in 2021 quantumzeitgeist.com. QuEra’s first machine, named Aquila (available via Amazon Braket), has 256 qubits – these are atoms cooled and trapped in a vacuum, arranged by laser tweezers into programmable patterns quera.com. The company’s special sauce is using Rydberg excitation of atoms to induce two-qubit gates or simulate spin Hamiltonians, which they leveraged to achieve a notable quantum advantage in simulating certain complex quantum phases. QuEra’s near-term goal is to transition from analog quantum simulation to fully digital, error-correctable quantum computing on its platform. They have also published blueprints for a modular neutral-atom architecture (with photonic links connecting atomic arrays). QuEra gained significant attention when in Feb 2024 they raised $230M in Series B – one of the largest in quantum – and announced plans for a new facility to build a million-qubit quantum computer in Chicago quera.com. QuEra’s achievements so far include demonstrating area-law entanglement on a 256-qubit 2D array (a milestone in quantum simulation) and being the first neutral-atom system on a major cloud platform (AWS). By combining high qubit counts, reconfigurability (atoms can be rearranged in arbitrary geometries each run), and strong Rydberg interactions, QuEra is at the forefront of quantum simulation of complex many-body problems and is rapidly advancing toward general-purpose computing quantumzeitgeist.com. It is arguably the leading neutral-atom quantum computing company in the West, paralleling Pasqal in Europe, and is a strong contender to achieve practical quantum advantage in optimization or machine learning tasks using its highly parallel qubit arrays.

QuintessenceLabs

QuintessenceLabs – An Australian cybersecurity company (Canberra, founded 2008) providing quantum-enhanced data protection solutions. QuintessenceLabs (QLabs) is best known for its high-speed quantum random number generator (QRNG), which produces truly random keys at rates of gigabits per second builtin.com. They integrate this QRNG into various products: an advanced encryption key management platform (Trusted Security Foundation), a virtual zero-trust storage appliance, and partnerships where their QRNG augments conventional security systems. QLabs also offers a Quantum Key Distribution system and has demonstrated long-distance QKD over fiber in Australia. The company’s value proposition is delivering “unbreakable” keys and robust key management – its qStream™ QRNG provides a continuous stream of entropy to feed encryption systems, ensuring even if algorithms are strong, the randomness isn’t a weakness builtin.com. Recognized as a leader in quantum-enhanced cybersecurity, QuintessenceLabs has enterprise and government clients globally. For example, they worked with Australia’s Department of Defence to test quantum key generation in securing sensitive communications. They have also integrated with Oracle databases to provide on-the-fly quantum key generation for data encryption. By “preparing organizations for a quantum-safe tomorrow,” QuintessenceLabs combines conventional best practices (key management, policy engines) with quantum tech (QRNG, QKD) to deliver end-to-end solutions that are robust against even quantum computer attacks builtin.com. As PQC algorithms roll out, QLabs’ complementary approach of strengthening the randomness and key distribution side of security remains highly relevant.

QunaSys

QunaSys – A Japanese quantum software startup (Tokyo, founded 2018) specializing in quantum chemistry and algorithm development uk.linkedin.com. QunaSys is known for its work in quantum algorithms for chemical simulations – crucial for drug discovery, material science, and energy research. Their flagship software Qamuy allows chemists to run quantum algorithms (like VQE – Variational Quantum Eigensolver) to calculate molecular properties using both actual quantum hardware and simulators. QunaSys has actively collaborated with Japan’s industry; for instance, they led a consortium with companies like JSR and Mizuho to study applications of quantum computing in materials and finance. They also partner with hardware makers (IBM, Rigetti) to optimize algorithms on those platforms. QunaSys was highlighted by the Japanese government as a key player in their quantum strategy and by 2022 raised ~$10M in Series B. Uniquely, QunaSys also focuses on quantum software engineering methodologies – they co-authored one of the first textbooks on quantum programming in Japanese and offer training to develop the workforce uk.linkedin.com. In 2023, they launched an open-source library “QURI” for interoperable quantum software development. Often called one of the world’s leading quantum algorithm startups in chemistry, QunaSys’s mission is to bridge quantum computing with the chemical and materials industries, ensuring that as quantum hardware grows, there will be ready-to-run applications that tackle pressing problems (like discovering new catalysts or battery materials faster) uk.linkedin.com. By blending deep chemistry knowledge with algorithmic expertise, QunaSys exemplifies how focusing on a vertical (chemistry) can position a startup to deliver early quantum advantage where it matters – in this case, the discovery of new molecules and materials with significant economic impact.

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Rigetti Computing

Rigetti Computing – A pioneer in superconducting quantum computers, Rigetti (Berkeley, CA, founded 2013) was one of the first startups to build full-stack gate-model quantum systems. Rigetti’s current machines (available on its Quantum Cloud Services and via AWS and Azure) include 80-qubit and 40-qubit superconducting processors with a unique multi-chip architecture in development builtin.com. Rigetti uses a scalable planar transmon qubit design and was first to demonstrate a 8-qubit entangling gate across two chips in 2018. They also innovated with a hybrid quantum-classical programming environment (Quil language and pyQuil SDK) early on. Rigetti went public via SPAC in 2022, injecting funds to pursue a roadmap of 1,000+ qubit systems with error mitigation by 2025. The company has achieved notable milestones: it performed one of the first quantum ML algorithms on a cloud system and partnered with DARPA on scaling challenges. Rigetti’s 80-qubit Aspen-M (2021) was the first commercial device to use a multi-chip module (two 40-qubit dies connected). While facing steep competition, Rigetti differentiates by tightly integrating its hardware and software – it offers a “full-stack solution” where its cloud delivers low-latency access to its own hardware for fast hybrid iterations builtin.com. Rigetti also fosters a developer community and has had programs with NASA, DOE, and many research institutes to explore applications from climate modeling to quantum optimization. As one of the few vertically integrated quantum computer manufacturers in the US, Rigetti’s success and struggles are a bellwether for the industry. The company’s bold vision is encapsulated in CEO Chad Rigetti’s mantra that quantum computing will “solve humanity’s most pressing and important problems,” from healthcare to energy builtin.com – and Rigetti is striving to be at the forefront of that revolution with practical, available quantum computing power builtin.com.

Riverlane

Riverlane – A UK-based quantum software company (Cambridge, founded 2016) focused on building the “operating system” for quantum computers, with a specialty in quantum error correction. Riverlane’s flagship product is Deltaflow.OS, a low-level software that interfaces with quantum hardware to efficiently execute quantum circuits and manage classical feedback and error tracking explodingtopics.com. By working closely with hardware teams, Riverlane has made Deltaflow.OS compatible with a wide range of qubit types, and it’s being used in the UK’s National Quantum Computing Centre to unify different devices under one system. Riverlane is also a leader in developing and benchmarking error correction techniques: in 2022, it led an effort that achieved a world-record quantum memory time using a 20-qubit error-correcting code on a superconducting device. The company collaborates internationally (e.g., with Q-CTRL on an error mitigation partnership and with hardware companies like Oxford Ionics on integrating control software). Riverlane has significant contracts, including one with the U.S. NIST to provide an error correction stack. Their goal is to lay the software foundations so that when quantum hardware scales to hundreds or thousands of qubits, an “OS-like layer” will manage qubit resources, error logs, and compiler scheduling in an optimal way explodingtopics.com. Riverlane also actively engages in algorithm research, especially in quantum simulation for materials. By tackling the hardest problem – making unreliable qubits act reliably through software – Riverlane intends to dramatically increase performance of quantum computers. As they put it, they ensure that quantum operations happen “at the right level in the tech stack, increasing performance dramatically” explodingtopics.com. With strong support from the UK government and investors, Riverlane is positioning itself as the quantum equivalent of Microsoft of the PC era, aiming to supply the core software layer for all quantum computing hardware.

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SandboxAQ

SandboxAQ – A U.S. enterprise software company that spun off from Google in 2022, combining AI and quantum technologies to address problems in cybersecurity, healthcare, and more explodingtopics.com. Rather than building quantum computers, SandboxAQ focuses on leveraging today’s tools (post-quantum cryptography, quantum physics-based algorithms, advanced AI) to deliver value. For cybersecurity, SandboxAQ provides solutions to inventory and upgrade cryptographic systems to quantum-resistant algorithms for large organizations (Google is a client). In navigation and timing, they develop quantum sensors (like an AI-enhanced quantum optical gyroscope to replace GPS in denied environments). In drug discovery, they use AI and quantum chemistry algorithms on classical HPC to improve simulation of molecular interactions. Essentially, SandboxAQ’s strategy is to integrate quantum science into practical software that requires high-performance computing today, primarily targeting industries like finance, telecom, and defense that need future-proofing against quantum threats or can benefit from quantum-inspired algorithms explodingtopics.com. With financial backing from Alphabet and notable advisors (former Google CEO Eric Schmidt), SandboxAQ hit a valuation over $2B by 2023. It acquired a cybersecurity firm (Cryptosense) to bolster its cryptography automation. By serving enterprise clients with a blend of AI and quantum tech, SandboxAQ generates revenue immediately (in areas such as encryption audits) while positioning itself to incorporate quantum computers when available. Their work in quantum simulation (for example, simulating materials for battery design with AI assistance) exemplifies how quantum ideas can improve classical solutions in the near term explodingtopics.com. SandboxAQ thus represents a new breed of company focusing on the quantum software/algorithmic layer plus AI, rather than building hardware – an approach likely to bring incremental benefits now and bigger payoffs as quantum computing matures.

SeeQC

SeeQC – A New York and UK-based company (founded 2018) developing a unique digital superconducting quantum computing platform. SeeQC’s approach involves pairing superconducting qubits with proprietary Single Flux Quantum (SFQ) digital logic co-fabricated on the same chip seeqc.com. Their goal is to offload certain control and error-correction tasks to fast, energy-efficient classical SFQ circuits operating at the cryogenic temperature, thereby creating a hybrid quantum-classical processor. In 2020, SeeQC unveiled the world’s first “digital quantum management chip”, demonstrating SFQ control for a small qubit array seeqc.com. This could drastically reduce the bottleneck of wiring and latency, as local SFQ circuits can control qubits at 40 GHz speeds in situ seeqc.com. SeeQC also operates one of the few commercial superconducting chip fabs in the world (in Elmsford, NY) and offers foundry services, giving it vertical integration. In 2022, SeeQC announced a collaboration with NVIDIA to develop a chip-to-chip quantum-classical integration using SFQ and GPUs seeqc.com. SeeQC’s architecture aims for scalability through digital error correction – by implementing classical error-correcting codes directly at the hardware level with SFQ, they hope to manage hundreds of physical qubits per logical qubit more efficiently seeqc.com. They also have a UK subsidiary working on a UK government-funded project to build a digital 4-qubit prototype. If successful, SeeQC’s “Digital Quantum Computing” paradigm could solve many issues plaguing analog-only superconducting systems: reducing noise, simplifying I/O, and enabling complex feedback at the speed of qubit operations seeqc.com. It’s a bold plan blending classic computing’s strengths with quantum – essentially embedding a classical co-processor at the cryogenic stage – which could significantly improve the viability of large superconducting quantum computers by giving them a nervous system for real-time control and error suppression seeqc.com.

Silicon Quantum Computing (SQC)

Silicon Quantum Computing (SQC) – An Australian company (Sydney, established 2017) aiming to build a 10-qubit quantum integrated circuit in silicon as a prototype toward full-scale silicon-based quantum computers sqc.com.au. Led by Professor Michelle Simmons (a leading figure in atomic-scale silicon device fabrication), SQC’s approach involves placing individual phosphorus atoms in silicon with sub-nanometer precision to function as qubits (using their electron or nuclear spins). In 2022, SQC made headlines by demonstrating a 10-qubit linear array of atom qubits – touted as the first integrated silicon quantum processor at that scale nextbigfuture.com. Each atom’s spin can be controlled and entangled with neighbors via finely tuned electrodes. The achievement built on Simmons’ prior world-record atomic transistor and 3-qubit results. SQC’s vision is to leverage silicon CMOS infrastructure: if atom qubits can be reliably created and controlled, they could piggyback on existing manufacturing techniques for scaling. The Australian government and industry partners (like Telstra and Commonwealth Bank) have invested around AUD ~$150M in SQC, underscoring its national importance. SQC is also pioneering new theories for error correction suited to analog quantum dots. They plan to demonstrate a 100-qubit device by 2025 and integrate with cryo-CMOS classical controls being developed by collaborators. Silicon qubits have shown some of the longest coherence times in solid-state and can operate at slightly higher temperatures than superconducting. If SQC succeeds, it could produce quantum chips that slot into today’s chip packaging, making quantum computing far more deployable. Already, in 2023, SQC reported the first two-qubit logic gate in silicon with atomic qubits at atomic precision. By “turning silicon into quantum silicon,” SQC aspires to keep Australia at the forefront of quantum hardware and eventually deliver a useful, general-purpose quantum computer on a silicon chip nextbigfuture.com.

SpinQ

SpinQ Technology – A Shenzhen, China-based company (founded 2018) specializing in portable quantum computers and educational quantum devices spinquanta.com. SpinQ uses room-temperature Nuclear Magnetic Resonance (NMR) technology to create small quantum computing devices that are accessible and affordable for classrooms and enthusiasts. In 2020, SpinQ released the Gemini, a 2-qubit tabletop quantum computer – the world’s first portable quantum computer for education spinquanta.com. They followed up with Gemini Mini and Triangulum, compact devices with built-in touchscreen controls spinquanta.com. These machines allow students to run basic quantum algorithms (like superposition demonstrations, simple Grover’s search) without needing a dilution fridge or complex infrastructure. SpinQ’s strategy is to popularize quantum computing and build a pipeline of talent by providing hands-on experience. They have placed these units in dozens of schools and science museums worldwide. SpinQ is also developing larger NMR systems (up to 3–4 qubits) and researching superconducting qubit processors (they announced a prototype 3-qubit superconducting chip in 2022). However, their commercial niche remains education and niche applications like quantum sensing. By making quantum “real” to more people – literally letting one carry a quantum computer on a cart – SpinQ is performing a valuable service in demystifying quantum tech spinquanta.com. Additionally, SpinQ offers a cloud platform and simulation software to complement their physical devices spinquanta.com. Their efforts mean that even as full-scale quantum computers remain in labs, quantum education is going portable, inspiring the next generation of researchers and developers spinquanta.com.

Strangeworks

Strangeworks – An Austin, Texas-based startup (founded 2018 by whurley) on a mission to make quantum computing accessible to all. Strangeworks offers a collaborative software platform that integrates numerous quantum hardware and software tools in one place strangeworks.com. Through Strangeworks QC™, users (from developers to enthusiasts) can write code in popular quantum SDKs (Qiskit, Cirq, Ocean, etc.), manage projects, and run tasks on various backends – all via a unified cloud interface. The platform also provides shared workspaces so teams can organize and iterate on quantum experiments together strangeworks.com. Strangeworks curates a catalog of quantum resources (including a library of example algorithms and data sets) to lower the learning curve strangeworks.com. They partner with virtually all major quantum hardware providers (IBM, D-Wave, IonQ, Rigetti and more) and were among the first to add access to emerging systems like OQC’s Lucy. Aside from the platform, Strangeworks emphasizes education: they regularly publish “Quantum for Everyone” content and have contributed to open source. In 2023, Strangeworks launched Strangeworks Ecosystem, bringing together hardware, software, educational content, and even non-QC “future compute” resources (like simulators and emulators) under one API strangeworks.com. Their angle is that quantum computing’s progress will be accelerated by community and collaboration, not siloed efforts. By providing a neutral meeting ground for all players, Strangeworks aims to be the GitHub of quantum computing – a place where knowledge is shared and projects flourish. They’ve garnered a vibrant user base and secured funding from investors like IBM and Honeywell. As quantum computing matures, Strangeworks plans to monetize through enterprise features (they announced Strangeworks Harness for enterprise workflow integration) and by being the go-to quantum cloud aggregator. In short, Strangeworks is ensuring that if you want to work with quantum tech, you can do it easily and socially on their platform, accelerating adoption and innovation across the field strangeworks.com.

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Tencent (Quantum Lab)

Tencent Quantum Lab – The Quantum Lab of Tencent (a Chinese tech giant) focuses on quantum algorithms and applications, especially those related to Tencent’s core businesses in AI and internet services quantumcomputingreport.com. Established around 2018, Tencent’s quantum research team has worked on quantum machine learning, quantum chemistry simulations, and optimized compilers. One project, TenCirChem (open-sourced on GitHub), is a chemistry computation package built on TensorFlow Quantum that helps simulate molecular energies using variational algorithms github.com. Tencent Quantum Lab has also published cutting-edge research on topics like quantum-enhanced recommendation systems and quantum optimization for cloud computing tasks. They actively collaborate with academia (e.g., a partnership with Prof. Yuan Xie’s team on quantum electronic design automation). While rivals Alibaba and Baidu invested in hardware, Tencent took a more software-oriented approach, aiming to find quantum advantages in things like machine learning and drug discovery, which align with its AI and cloud services quantumcomputingreport.com. Tencent has predicted a convergence of HPC, cloud, edge, and quantum computing in its technical roadmap theregister.com, and through investments has a stake in quantum startups worldwide (it invested in IQM, Pasqal, and others). Notably, Tencent is a major backer of Horizon Quantum Computing in Singapore techcrunch.com. There were reports in late 2022 that Tencent was reallocating some resources from fundamental quantum research to nearer-term projects (in line with Baidu and Alibaba pulling back), but Tencent hasn’t publicly confirmed scaling down. Regardless, the expertise and IP developed by Tencent Quantum Lab – such as advanced quantum chemistry algorithms and improved quantum AI techniques – remain valuable. Tencent also continues exploring post-quantum cryptography for its vast user base security. Summed up, Tencent’s quantum efforts are geared to apply quantum computing in enhancing AI, fintech, and cloud, ensuring the company can harness quantum power (developed in-house or via partners) to maintain its edge in the era of quantum-accelerated services quantumcomputingreport.com.

Terra Quantum

Terra Quantum – A Swiss/German quantum technology firm (founded 2019) offering a broad suite of quantum-as-a-service solutions in algorithms, software, and quantum security terraquantum.swiss. Terra Quantum is divided into divisions addressing quantum algorithms (for optimization, chemistry, machine learning), quantum computing as a service (hybrid cloud access), and quantum-safe cryptography. For example, Terra Quantum’s algorithms team has developed improved variational algorithms for logistics and supply chain problems, providing quantum-inspired solutions that outperform classical ones in some instances. They also created “TQsolve,” a tool for solving large optimization problems using a mix of classical and quantum techniques. In quantum security, Terra Quantum is working on quantum-safe communication protocols and even claims progress on a novel approach called “Quantum Key Distribution over the Cloud” (using purely software-based quantum security). The company emphasizes an “end-to-end” capability – from formulating the problem to delivering a solution on appropriate hardware terraquantum.swiss. It runs a hybrid quantum cloud platform connecting to multiple hardware backends (IBM, D-Wave, etc.) and orchestrating computations. Terra Quantum’s research arm has published on topics like quantum speed-up for fluid dynamics simulations and quantum-enhanced AI. With around 80 employees (including a Nobel laureate advisor), Terra Quantum has attracted considerable media for claims such as a breakthrough in quantum-safe blockchain. While some claims have been met with skepticism, Terra Quantum is undeniably pushing boundaries: for instance, they demonstrated quantum attacks on certain post-quantum cryptography schemes, helping improve them terraquantum.swiss. The company’s motto is “leading the second quantum revolution,” and to that end they’ve raised about $75M and form partnerships with industry (e.g., a project with BMW for quantum chemistry in material design). In a sentence, Terra Quantum is a quantum services powerhouse, aiming to deliver commercially valuable quantum solutions now by combining algorithms, software, and robust infrastructure – effectively a one-stop shop for enterprises to explore and benefit from quantum technology terraquantum.swiss.

Thales

Thales Group – A French multinational specializing in aerospace, defense, and security, which is heavily involved in quantum-safe communications and quantum sensing. While Thales doesn’t build quantum computers, it works on integrating quantum tech into its products: for example, developing quantum random number generators and quantum key distribution systems to incorporate into its encryption solutions idquantique.com. Thales partnered with ID Quantique to distribute IDQ’s QKD and QRNG within its high-security networking products, aiming to offer “quantum-ready” encryption to governments and banks thequantuminsider.com. In sensors, Thales is a leader in quantum gravimeters and magnetometers; their research labs have built cold-atom based accelerometers for precise navigation (important for submarines, spacecraft, etc.). Thales also leads the European Union’s QuanTum flagship project on next-gen atomic clocks and has developed a demonstrator of a quantum radar (using entangled photons to improve detection of stealth objects). In 2023, Thales unveiled the world’s first quantum-resistant security module compliant with new PQC standards, showing its commitment to cryptographic agility. Additionally, Thales provides services to assess and upgrade clients’ cryptographic infrastructure in preparation for quantum threats. On the R&D side, Thales actively explores continuous-variable QKD and invests in photonic integrated circuits for secure communications. They also collaborate on EU quantum projects like CiViQ (convergent QKD networks) and have built prototype quantum chips for frequency conversion of single photons. As a major defense contractor, Thales ensures Western countries have domestic capability in quantum tech to reduce reliance on foreign providers – e.g., developing European QRNG chips, quantum clocks for GPS independence, etc. In summary, Thales functions as a systems integrator of quantum technologies into real-world applications, guaranteeing that its critical systems (from military comms to commercial data centers) remain secure and cutting-edge in the quantum era idquantique.com.

Toshiba

Toshiba – The Japanese conglomerate has been a pioneer in quantum cryptography and quantum communication for over two decades spinquanta.com. Toshiba’s Cambridge Research Lab in the UK was among the first to develop practical quantum key distribution (QKD) systems in the early 2000s, and Toshiba has since commercialized QKD hardware that consistently achieves world-leading performance. Their QKD systems have demonstrated key distribution over standard telecom fibers exceeding 100 km at high key rates spinquanta.com. In 2020, Toshiba launched the world’s first multiplexed QKD system, allowing quantum keys and classical data to transmit on the same fiber with minimal interference, which drastically lowers deployment cost spinquanta.com. Toshiba’s QKD has been tested in financial networks in Geneva and backbone networks in the UK and Japan. The company also developed the record-setting Twin-Field QKD protocol (proved secure over >600 km fiber with optical repeaters). Beyond QKD, Toshiba is researching quantum repeaters and quantum satellites to extend secure links globally. In quantum computing, Toshiba has explored quantum-inspired optimization (its Simulated Bifurcation Algorithm is well-known and deployed on FPGAs for financial use). Toshiba’s quantum-secure communication technologies are considered among the most advanced – they formed consortiums to install QKD in metro networks and data centers for clients like BT and JPMorgan spinquanta.com. Additionally, Toshiba is innovating in quantum random number generation and optical quantum computing on a smaller scale. By leveraging its electronics and optics expertise, Toshiba has been able to create QKD systems that are highly stable: in 2021 they reported an autonomous QKD operation for over a year on installed fiber without human intervention, a big step toward real-world adoption spinquanta.com. Toshiba’s early and sustained efforts in quantum tech have ensured that it remains a top player in quantum-safe communications, aligning with Japan’s strategy to secure communications against future threats well ahead of time spinquanta.com.

U

Universal Quantum

Universal Quantum – A UK-based startup (founded 2018 by Sussex University researchers) working to build a large-scale ion-trap quantum computer using an innovative modular architecture. Universal Quantum’s design uses trapped ions on silicon chips, but instead of moving ions between zones with electrodes (which can be slow and error-prone), they use fast electric-field links (called microwave links) to connect separate ion traps, shuttling quantum states via electric forces explodingtopics.com. This approach potentially allows many modules to operate in parallel and occasionally “swap” entangled states, assembling a huge logical processor. Universal Quantum was awarded a €67M contract by the German Aerospace Center (DLR) in 2022 to build a trapped-ion quantum computer, underscoring confidence in their approach. They also raised over $20M in venture funding. Universal Quantum’s team includes pioneers in ion-trap technology who set records for ion transport speed and quantum gate fidelity using just microwaves (no lasers required, simplifying hardware). The company claims their architecture, once realized, could scale to 1e6 qubits with thousands of operations per second per qubit – a path to fault tolerance. An impressive aspect is their focus on manufacturability: their traps can be made with standard silicon processes, and the use of low-frequency microwave control removes much of the bulk optics needed in other ion-trap systems explodingtopics.com. Universal Quantum has also garnered high-profile investors like tech billionaire Hermann Hauser (of Arm fame) and has backing from the UK government. While still in R&D phase (no public prototype yet), they published a concrete blueprint for a 2D array of 2,500 ion traps networked to achieve one million qubits with error correction. If they execute, Universal Quantum could leapfrog the incremental qubit gains of others by delivering a shockingly large-scale machine. Their recent partnership with Rolls-Royce to explore quantum for aerospace optimization hints at early applications. In summary, Universal Quantum is ambitiously engineering quantum computing at scale from the outset, with a clear vision of the technology and engineering integration needed to go from a few qubits to a million explodingtopics.com.

X

Xanadu

Xanadu – A Canadian quantum computing company (Toronto, founded 2016) leading in photonic quantum computing and the developer of the popular PennyLane software library builtin.com. Xanadu’s hardware uses squeezed light (continuous-variable photons) traveling through optical circuits to perform quantum computations at room temperature. In 2022, Xanadu achieved a major milestone with their Borealis photonic processor: it performed a Gaussian boson sampling task with 216 squeezed modes and 125 million samples, which they reported took 36 μs but would take the best classical algorithm 9,000 years – a quantum advantage experiment builtin.com. This was the first photonic quantum advantage and used Xanadu’s unique time-multiplexed approach (looping light through a fiber delay to reuse optical components). On the software side, Xanadu created PennyLane, an open-source quantum machine learning and quantum chemistry library that has become a standard for hybrid quantum-classical programming builtin.com. It allows integration of quantum circuits (on any hardware) with machine learning frameworks like PyTorch and TensorFlow, greatly simplifying development of variational algorithms. This has fostered a large community of researchers and developers around Xanadu’s tools. In 2023, Xanadu raised $100M Series C (with a valuation around $1B) to continue scaling their photonic hardware and hiring top optics talent. They plan to build error-corrected photonic qubits using qubit encodings like GKP states. Xanadu’s business strategy also includes offering cloud access (its Strawberry Fields platform) and working with partners on quantum chemistry simulations. By advancing both the platform (PennyLane) and the photonic chips, Xanadu is bridging cutting-edge research and real-world adoption – their PennyLane library is widely used in academia and industry for designing experiments on all kinds of hardware, effectively making Xanadu an influential player even beyond its own hardware users builtin.com. Xanadu stands out as the leading North American photonic quantum computing firm and a trendsetter in quantum software, driving forward the vision of quantum computers that are not only powerful but also “useful and available to people everywhere,” as their mission statement declares builtin.com.

Z

Zapata Computing

Zapata Computing (Zapata AI) – A Harvard spin-out founded in 2017 (Boston, USA) that became known for its enterprise quantum software platform Orquestra and work in quantum machine learning. Zapata initially focused on developing algorithms (like VQE for chemistry, quantum combinatorial optimization, etc.) and provided consulting to Fortune 500 companies on how to integrate quantum computing into their workflows builtin.com builtin.com. Orquestra, launched in 2019, is a workflow tool that allowed users to stitch together classical and quantum tasks, run them on various quantum hardware backends, and analyze results – essentially an agnostic quantum orchestration platform builtin.com. Zapata partnered with major firms (like BP, Roche, and DARPA projects) to explore use cases in materials discovery, supply chain optimization, and natural language processing. They also delved into quantum-enhanced generative AI. However, around 2022, Zapata pivoted more towards the booming AI field, rebranding as “Zapata AI” and focusing on enterprise AI software (while still leveraging some quantum techniques for things like optimizing AI model training) thequantuminsider.com. In mid-2024, news broke that Zapata AI was ceasing operations due to financial challenges thequantuminsider.com. This marked one of the first high-profile closures of a quantum software startup. Despite that, Zapata’s influence was significant: it produced a widely-cited early quantum textbook (from its founders) and open-sourced parts of Orquestra. It also contributed to lowering the barrier for enterprises to experiment with quantum by providing workflows in a familiar software environment builtin.com. The shutdown reflects the difficulty of generating revenue in quantum software ahead of quantum advantage. Nevertheless, Zapata’s legacy includes corporate awareness – many large companies started quantum teams after pilots with Zapata – and technical contributions like advances in quantum optimization and quantum-inspired neural networks. The Zapata story underscores that while quantum software holds great promise, the market timing and need for near-term value have driven some companies to refocus or fold in the absence of sufficiently powerful hardware.

Zurich Instruments

Zurich Instruments – A Swiss company (founded 2008, now part of Rohde & Schwarz) that provides high-end control and measurement systems for quantum computing and physics research. Zurich Instruments (ZI) produces the Quantum Computing Control System (QCCS) – a suite of electronic instruments including microwave generators, AWGs, quantum analyzers, and a centralized controller (PQSC) that together can control 100+ qubits with picosecond synchronization zhinst.com. ZI’s equipment is renowned for its signal fidelity and software integration. For example, their UHFQA Quantum Analyzer can read out 10 superconducting qubits simultaneously with high SNR, and their SHFQA extends this to 64 qubits at up to 8.5 GHz zhinst.com zhinst.com. The PQSC controller links up to 18 instruments with sub-nanosecond timing, enabling large-scale experiments zhinst.com zhinst.com. These capabilities make ZI a key enabler for scaling up lab systems into multi-qubit setups. Most major superconducting and spin qubit labs (and many startups) use ZI’s hardware for qubit drive and readout. In 2022, ZI introduced the SHFQC, a 6-qubit controller combining an AWG and readout in one unit, which simplifies system complexity zhinst.com. They also triple the channel count of their system in 2023 thequantuminsider.com, showing their commitment to meet the demands of growing qubit counts. Additionally, ZI actively collaborates with quantum hardware companies – e.g., partnering with QuantWare to provide pre-integrated control stacks for QuantWare’s processors linkedin.com. In quantum sensing, ZI lock-in amplifiers and phase-locked loops are ubiquitous. By delivering instrumentation that “bridges the classical-quantum divide,” Zurich Instruments plays a crucial and often unsung role in the quantum ecosystem zhinst.com. Their hardware ensures that improvements in qubit quality and quantity can actually be utilized, by providing the stable, precise, and scalable control systems needed. With Rohde & Schwarz’s acquisition in 2021, ZI has even more resources to innovate. In effect, Zurich Instruments is the Nervous System provider for quantum experiments – without which the muscles (qubits) cannot be flexed effectively zhinst.com zhinst.com.

Each of these 100 companies contributes a vital piece to the global quantum technology puzzle – from building powerful quantum hardware to crafting software that harnesses it, and from securing our data against quantum threats to training the next generation of quantum scientists. Together, they are driving the quantum revolution forward, transforming the promise of quantum computing into practical reality.

Sources: spinquanta.com builtin.com spinquanta.com builtin.com quantumcomputingreport.com (and many others as cited above)