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AppFlowySiYuan
Free

The open-source software is available without a license fee. Hosting, hardware and…

 Freemium

Most features are free, including for commercial use. The official cloud sync and assets…

Windows, macOS, Linux, Android, iOS Windows, macOS, Linux, Android, iOS, Self-hosted
  • Provides desktop and mobile clients with self-hosting options.
  • Block-level references and two-way links with custom attributes
  • SQL queries embedded inside notes for building your own views
  • Cloud synchronization requires additional service setup or an account.
  • Notes live in the app's own store rather than plain files in a folder
  • The interface has a lot of concepts to learn at once
Downloadable app Downloadable app, Self-hosted
Open source Open source
License: AGPL-3.0 License: AGPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 22, 2026

Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.