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Kleopatra vs Sequoia PGP: catalog facts
Kleopatra	Sequoia PGP
Free Free and open source.	Free Free and open source.
Linux	Linux, Command line
Handles both OpenPGP and S/MIME certificates Key lookup through key servers, LDAP and WKD	Written in memory-safe Rust Usable both as a library and through the sq command-line tool
Certificate concepts can be daunting for newcomers	Command-line only, with no graphical interface Much of the project is aimed at developers rather than end users
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: LGPL-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 23, 2026

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