AI Assistant Showdown: ChatGPT vs Siri vs Alexa – Inside the 2025 Personal AI Revolution
Siri debuted in 2011 on the iPhone 4S as the first widely used voice assistant. Alexa launched in 2014 with the Echo, popularizing voice-controlled smart home devices. ChatGPT, built on GPT-4, launched in late 2022 and reached 100 million users by January 2023. Google introduced Gemini in 2024 as a major overhaul of its AI assistant, with multi-turn reasoning and deep Android integration, and by July 2025 Gemini could proactively interface with apps like Gmail and WhatsApp. Microsoft rolled out 365 Copilot and Windows Copilot in 2023, embedding GPT-powered copilots in Word, Excel, Outlook, PowerPoint, and Windows, with 365 Copilot