Compare software

GnuPGGpg4win
Free

Free and open source under the GPL.

 Free

Free software, funded by donations and public contracts.

Windows, macOS, Linux, Command line Windows
  • The reference free OpenPGP implementation, present everywhere
  • Smartcard and hardware token support through its agent
  • Kleopatra gives GnuPG a real key manager instead of a command line
  • Integrates with Outlook through GpgOL and with Explorer through GpgEX
  • Key management and the command line are famously unforgiving
  • Defaults and trust models confuse newcomers into unsafe practice
  • Windows only
  • OpenPGP key management is genuinely hard, and the concepts do not hide well behind a GUI
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0 License: GPL-2.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 22, 2026

Checked September 20, 2026

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