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AFFiNE Community vs SiYuan: catalog facts
AFFiNE Community	SiYuan
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, Self-hosted, Web	Windows, macOS, Linux, Android, iOS, Self-hosted
Offers a self-hostable community edition with linked workspace content.	Block-level references and two-way links with custom attributes SQL queries embedded inside notes for building your own views
Cloud services and enterprise offerings have separate terms.	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, Self-hosted	Downloadable app, Self-hosted
Open source	Open source
License: MIT	License: AGPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 21, 2026

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