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KeePassButtercup
Free

Free and open source under the GPL.

 Free

Free and open source, no longer developed.

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

Checked September 22, 2026

Checked September 26, 2026

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