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Kleopatra vs KGpg: catalog facts
Kleopatra	KGpg
Free Free and open source.	Free Free and open source under the GPL.
Linux	Linux
Handles both OpenPGP and S/MIME certificates Key lookup through key servers, LDAP and WKD	Simple interface over GnuPG Shows signatures, trust and expiry at a glance
Certificate concepts can be daunting for newcomers	Linux only Fewer features than Kleopatra, with no S/MIME support
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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