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SiYuan vs Synology Note Station Client: catalog facts
SiYuan	Synology Note Station Client
Freemium Most features are free, including for commercial use. The official cloud sync and assets…	Free Free with a Synology NAS that runs the Note Station package.
Windows, macOS, Linux, Android, iOS, Self-hosted	macOS, Self-hosted
Block-level references and two-way links with custom attributes SQL queries embedded inside notes for building your own views	Notes stay on your own NAS Rich text, media embedding and attachments
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	Requires Synology NAS hardware Closed source and tied to the Synology ecosystem
Downloadable app, Self-hosted	Downloadable app, Self-hosted
Open source	Closed source
License: AGPL-3.0	License not stated
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 October 2, 2026

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