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QOwnNotesObsidian
Free

Free and open source under the GPL.

 Free

Free for everyone, including commercial use, in the vendor’s own words. Obsidian Sync and…

macOS, Linux Windows, macOS, Linux, Android, iOS, Browser extension
  • Notes are plain Markdown files, so nothing is locked in a proprietary format
  • Works with Nextcloud and ownCloud Notes, or any file sync you already use
  • 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
  • Many of the better features assume a Nextcloud or ownCloud server
  • The interface is dense and Qt-flavoured rather than native anywhere
  • 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
Downloadable app Downloadable app, Browser extension
Open source Closed source
License: GPL-2.0 License not stated
No account needed No account needed
Works offline Works offline

Checked September 21, 2026

Checked September 20, 2026

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