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Obsidian vs acreom: catalog facts
Obsidian	acreom
Free Free for everyone, including commercial use, in the vendor’s own words. Obsidian Sync and…	Freemium Usable without an account; a pricing page lists paid options.
Windows, macOS, Linux, Android, iOS, Browser extension	macOS
Notes are plain Markdown files in a folder you control, readable without the app Linking, backlinks, tags, graph view and fast search across the vault	Markdown pages for notes and issues Links Jira, GitHub and Linear issues into personal pages
The application is not open source, only the plugin ecosystem and the releases repository Syncing between devices means paying for Obsidian Sync or wiring up your own sync tool	Focused on developer workflows rather than general note-taking License not stated in the research
Downloadable app, Browser extension	Downloadable app
Closed source	Open source
License not stated	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 20, 2026	Official website Full listing and sources Checked October 2, 2026

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