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RemNoteObsidian
Freemium

Free tier available, with paid plans unlocking AI features and higher limits.

 Free

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

Windows, macOS, Web Windows, macOS, Linux, Android, iOS, Browser extension
  • Built-in spaced repetition turns notes into study material without a separate app
  • Works across web and native platforms
  • 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
  • AI-generated study features are gated behind paid plans
  • Combination of outlining and flashcards has a steeper learning curve than plain notes
  • 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, Web application Downloadable app, Browser extension
Closed source Closed source
License not stated License not stated
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 22, 2026

Checked September 20, 2026

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