100 Quantum Computing Companies Shaping the Global Quantum Revolution (2025)
Google Quantum AI claimed quantum supremacy in 2019 with its 54-qubit Sycamore processor. IBM advanced from a 127-qubit Eagle chip in 2021 to a 433-qubit Osprey in 2022 and targets a million-qubit system by decade’s end. D-Wave, Xanadu, PsiQuantum, QuEra, Rigetti, IonQ, Quantinuum, and Riverlane each reported milestones in hardware scale, funding, or commercial launches between 2020 and 2024.