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Synology Note Station Client vs SiYuan: catalog facts
Synology Note Station Client	SiYuan
Free Free with a Synology NAS that runs the Note Station package.	Freemium Most features are free, including for commercial use. The official cloud sync and assets…
macOS, Self-hosted	Windows, macOS, Linux, Android, iOS, Self-hosted
Notes stay on your own NAS Rich text, media embedding and attachments	Block-level references and two-way links with custom attributes SQL queries embedded inside notes for building your own views
Requires Synology NAS hardware Closed source and tied to the Synology ecosystem	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
Closed source	Open source
License not stated	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 October 2, 2026	Official website Full listing and sources Checked September 21, 2026

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