Compare software

andcliProton Authenticator
Free

Free and open source under the MIT licence.

 Free

Free and open source under the GPL, with no advertising. A Proton account is used for…

Windows, Command line Windows, Linux, Android, iOS
  • Shows 2FA codes directly in the terminal
  • Actively maintained
  • End-to-end encrypted sync between devices, which most free authenticators lack
  • Apps for Android, iOS, Windows, Linux and macOS
  • Terminal only, with no graphical interface
  • Small project with limited documentation
  • Sync requires a Proton account
  • Keeping codes on the same desktop you log in from weakens second-factor separation
Downloadable app Downloadable app
Open source Open source
License: MIT License: GPL-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.