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This NoteNotesnook
Free

Proprietary app distributed on Flathub; the homepage lists no price.

 Freemium

A free tier covers unlimited notes and sync across devices. A paid Pro subscription adds…

Windows, Linux, Android Windows, macOS, Linux, Android, Web
  • Works offline with encryption
  • Per-note password protection
  • End-to-end encrypted on device with XChaCha20-Poly1305 and Argon2, so the service holds no readable data
  • The full client codebase is published, which makes the privacy claim auditable
  • Proprietary, source not published
  • No macOS or iOS version listed
  • An account is required; it is a sync service, not a local-only app
  • Encryption means no server-side search, and losing your password loses the notes
Downloadable app Downloadable app, Web application
Closed source Open source
License: Proprietary License: GPL-3.0
Not stated if an account is needed Account needed
Works offline Works offline

Checked October 1, 2026

Checked September 21, 2026

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