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Gpg4win vs GpgFrontend: catalog facts
Gpg4win	GpgFrontend
Free Free software, funded by donations and public contracts.	Free Free and open source.
Windows	Windows, macOS, Linux
Kleopatra gives GnuPG a real key manager instead of a command line Integrates with Outlook through GpgOL and with Explorer through GpgEX	Choice of GnuPG or Rust rPGP engine Encrypts files, text and email from one app
Windows only OpenPGP key management is genuinely hard, and the concepts do not hide well behind a GUI	Users still need to understand OpenPGP key exchange
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked October 1, 2026

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