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GnuPG vs KGpg: catalog facts
GnuPG	KGpg
Free Free and open source under the GPL.	Free Free and open source under the GPL.
Windows, macOS, Linux, Command line	Linux
The reference free OpenPGP implementation, present everywhere Smartcard and hardware token support through its agent	Simple interface over GnuPG Shows signatures, trust and expiry at a glance
Key management and the command line are famously unforgiving Defaults and trust models confuse newcomers into unsafe practice	Linux only Fewer features than Kleopatra, with no S/MIME support
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-2.0-or-later
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.