AI Assistant Showdown: ChatGPT vs Siri vs Alexa – Inside the 2025 Personal AI Revolution
ChatGPT, based on GPT-4, launched in late 2022 and reached 100 million users by January 2023. Meta AI, launched in 2023, surpassed 400 million monthly users by September 2024. Google introduced Gemini in 2024, with deeper Android integration and app interfacing by July 2025. Amazon announced Alexa+ in February 2025, but early adoption remained limited.