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Org modeObsidian
Free

Free and open source, with optional support through Liberapay.

 Free

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

Windows, macOS, Linux Windows, macOS, Linux, Android, iOS, Browser extension
  • Notes, tasks, agenda and documents in one plain text format
  • Files are easy to sync and version control
  • 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
  • Requires GNU Emacs for the full feature set
  • Steep learning curve for people new to Emacs
  • 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-3.0 License not stated
No account needed No account needed
Works offline Works offline

Checked September 23, 2026

Checked September 20, 2026

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