Published by Andreessen Horowitz in March 2026 and authored by Olivia Moore, this biannual ranking orders consumer generative AI products by web traffic and mobile monthly active users. ChatGPT ranks first with roughly 900 million weekly active users, followed by Gemini, with the 2026 edition broadening its definition to include AI-assisted legacy apps like Canva and Notion.
Distinct from a16z's separately published Notes on AI Apps in 2026, this recurring ranking series has become a widely cited barometer of which consumer AI products are actually gaining sustained usage, as opposed to which generate the most announcement-driven attention.