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Many Notes vs SiYuan: catalog facts
Many Notes	SiYuan
Free Free and open source under the MIT licence.	Freemium Most features are free, including for commercial use. The official cloud sync and assets…
Web, Self-hosted	Windows, macOS, Linux, Android, iOS, Self-hosted
Notes kept as files in the filesystem Backlinks, tags and templates	Block-level references and two-way links with custom attributes SQL queries embedded inside notes for building your own views
Some features need an HTTPS reverse proxy Requires running a server	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
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 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.