Notion is a productivity and collaboration software company founded in 2013 and based in San Francisco, California. It offers an all-in-one workspace platform that helps individuals and teams organize notes, tasks, projects, and knowledge in a customizable way. Users can create pages, tables, lists, and boards, allowing them to tailor their workflows without needing coding skills. The main product is a collaborative workspace that integrates various productivity functions, including note-taking, project tracking, and knowledge management. Notion also features an AI-powered assistant, Notion AI, which assists users with writing and content improvement. Additionally, Notion Mail, an email client launched in 2025, integrates with Notion AI to enhance email management. The company serves a diverse audience, from individual users to large enterprises, and has grown rapidly, reaching over 20 million users by 2021.