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SiYuan vs acreom: catalog facts
SiYuan	acreom
Freemium Most features are free, including for commercial use. The official cloud sync and assets…	Freemium Usable without an account; a pricing page lists paid options.
Windows, macOS, Linux, Android, iOS, Self-hosted	macOS
Block-level references and two-way links with custom attributes SQL queries embedded inside notes for building your own views	Markdown pages for notes and issues Links Jira, GitHub and Linear issues into personal pages
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	Focused on developer workflows rather than general note-taking License not stated in the research
Downloadable app, Self-hosted	Downloadable app
Open source	Open source
License: AGPL-3.0	License not stated
No account needed	No account 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.