Compare software

Gpg4win vs GnuPG: catalog facts
Gpg4win	GnuPG
Free Free software, funded by donations and public contracts.	Free Free and open source under the GPL.
Windows	Windows, macOS, Linux, Command line
Kleopatra gives GnuPG a real key manager instead of a command line Integrates with Outlook through GpgOL and with Explorer through GpgEX	The reference free OpenPGP implementation, present everywhere Smartcard and hardware token support through its agent
Windows only OpenPGP key management is genuinely hard, and the concepts do not hide well behind a GUI	Key management and the command line are famously unforgiving Defaults and trust models confuse newcomers into unsafe practice
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: GPL-3.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 22, 2026

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