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TheBrainTriliumNext Notes
Free

The desktop app is free according to the developer's site.

 Free

Free and open source under the AGPL 3.0.

Windows, macOS, Linux Windows, macOS, Linux, Web, Self-hosted
  • Ideas can link to many contexts without duplication
  • Long-developed product with a large user base
  • Cloning puts one note in several places without copying it
  • Rich text, code notes, canvases, Mermaid diagrams and relation maps
  • Network-style interface takes time to learn
  • Not open source
  • Notes live in a database, not plain files, so lock-in is real
  • The interface is dense and takes a while to get comfortable with
Downloadable app Downloadable app, Self-hosted
Closed source Open source
License not stated License: AGPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 2, 2026

Checked September 21, 2026

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