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Kleopatra vs GnuPG: catalog facts
Kleopatra	GnuPG
Free Free and open source.	Free Free and open source under the GPL.
Linux	Windows, macOS, Linux, Command line
Handles both OpenPGP and S/MIME certificates Key lookup through key servers, LDAP and WKD	The reference free OpenPGP implementation, present everywhere Smartcard and hardware token support through its agent
Certificate concepts can be daunting for newcomers	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 not stated	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 24, 2026	Official website Full listing and sources Checked September 22, 2026

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