AppFlowy

The team behind AppFlowy used Notion daily and paid for it, then ran into its limits on data security and mobile. AppFlowy is their answer: an open source AI workspace for documents, wikis and project management, and an alternative to the tool it grew out of.

It is written in Flutter and Rust, a single codebase covering desktop and mobile with a native feel and long-term maintainability. Self-hosting is documented, so an individual or a company can keep the data on infrastructure they control.

The project is shaped around who is running it.

• Desktop: macOS, Windows and Linux builds, plus FlatHub, Snapcraft and SourceForge channels.
• Mobile: iPhone through the App Store and Android 10 or above through the Play Store, with ARMv7 unsupported.
• Self-hosting: run the backend yourself and keep full control over where the data lives.
• Building blocks: collaboration infrastructure for enterprises and hackers who want to build their own apps on top.
• Translations: edit the JSON files by hand, use the inlang online editor, or run a machine translation command.

Development instructions are documented per operating system, the roadmap is public, and feature requests and bug reports go through their own templates. The stated values put data privacy first, and the codebase is open to anyone who wants to modify AppFlowy for their own needs.