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GnuPG vs Kleopatra: catalog facts
GnuPG	Kleopatra
Free Free and open source under the GPL.	Free Free and open source.
Windows, macOS, Linux, Command line	Linux
The reference free OpenPGP implementation, present everywhere Smartcard and hardware token support through its agent	Handles both OpenPGP and S/MIME certificates Key lookup through key servers, LDAP and WKD
Key management and the command line are famously unforgiving Defaults and trust models confuse newcomers into unsafe practice	Certificate concepts can be daunting for newcomers
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 24, 2026

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