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AuthPassButtercup
Free

Free and open source under the GPL-3.0.

 Free

Free and open source, no longer developed.

Windows, macOS, Linux, Android, iOS, Web Windows, macOS, Linux
  • Same app on every major desktop and mobile platform
  • Reads KeePass KDBX 3 and 4 files
  • Vaults are ordinary encrypted files you control, with no Buttercup account
  • Installers for Windows, macOS and Linux, plus a portable Windows build
  • Auto-fill is only available on Android
  • Fewer advanced features than long-established KeePass clients
  • 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
Downloadable app, Web application Downloadable app
Open source Open source
License: GPL-3.0 License: GPL-3.0
No account needed No account needed
Not stated if it works offline Works offline

Checked September 23, 2026

Checked September 26, 2026

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