appflowy-io/appflowy

AppFlowy is an open-source alternative to Notion, the popular all-in-one workspace tool used for notes, wikis, project management, and team collaboration. The key problem it addresses is data control: with Notion and similar cloud-based tools, your notes and documents live on someone else's servers, which raises concerns about privacy, vendor lock-in, and what happens if the service changes its pricing or shuts down. AppFlowy lets you own your data entirely by self-hosting it on your own server, while still providing the polished, feature-rich experience of a modern collaborative workspace. The application provides rich-text documents with block-based editing (similar to Notion's page editor), Kanban boards for tracking tasks visually, databases with filtering and sorting (like Notion's table and board views), and wiki-style pages for documenting knowledge. It also integrates AI features to help with writing and summarizing content within your workspace. Multiple people can collaborate on documents in real time, and the app is available across desktop operating systems (macOS, Windows, Linux) and mobile (iOS and Android). Because the entire codebase is open source, developers and organizations can not only self-host AppFlowy but also extend and customize it to match specific workflows, which is not possible with proprietary tools. You would use AppFlowy if you want a Notion-like experience but need to keep sensitive data on infrastructure you control, for example in a regulated industry, a company with strict data policies, or simply as an individual who values privacy. The frontend is built with Flutter, Google's cross-platform UI framework written in Dart, which enables it to run natively on multiple platforms from one codebase. The backend logic is implemented in Rust.