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ButtercupAuthPass
Free

Free and open source, no longer developed.

 Free

Free and open source under the GPL-3.0.

Windows, macOS, Linux Windows, macOS, Linux, Android, iOS, Web
  • Vaults are ordinary encrypted files you control, with no Buttercup account
  • Installers for Windows, macOS and Linux, plus a portable Windows build
  • Same app on every major desktop and mobile platform
  • Reads KeePass KDBX 3 and 4 files
  • The project has ended; no updates or security fixes will follow the September 2024 release
  • Issues and pull requests are ignored, so bugs will not be fixed
  • Auto-fill is only available on Android
  • Fewer advanced features than long-established KeePass clients
Downloadable app Downloadable app, Web application
Open source Open source
License: GPL-3.0 License: GPL-3.0
No account needed No account needed
Works offline Not stated if it works offline

Checked September 26, 2026

Checked September 23, 2026

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