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ButtercupKeePass
Free

Free and open source, no longer developed.

 Free

Free and open source under the GPL.

Windows, macOS, Linux Windows
  • Vaults are ordinary encrypted files you control, with no Buttercup account
  • Installers for Windows, macOS and Linux, plus a portable Windows build
  • Entirely local, with no account and no service to trust
  • The kdbx format is read by dozens of compatible clients on every platform
  • 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
  • The official client is Windows-focused and its interface is dated
  • Syncing between devices is your responsibility
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0 License: GPL-2.0
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked September 26, 2026

Checked September 22, 2026

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