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SiYuan vs AFFiNE Community: catalog facts
SiYuan	AFFiNE Community
Freemium Most features are free, including for commercial use. The official cloud sync and assets…	Free The open-source software is available without a license fee. Hosting, hardware and…
Windows, macOS, Linux, Android, iOS, Self-hosted	Windows, macOS, Linux, Self-hosted, Web
Block-level references and two-way links with custom attributes SQL queries embedded inside notes for building your own views	Offers a self-hostable community edition with linked workspace content.
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	Cloud services and enterprise offerings have separate terms.
Downloadable app, Self-hosted	Downloadable app, Self-hosted
Open source	Open source
License: AGPL-3.0	License: MIT
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 22, 2026

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