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Kleopatra vs PGPTool: catalog facts
Kleopatra	PGPTool
Free Free and open source.	Free Free to download and use.
Linux	Windows, macOS, Linux
Handles both OpenPGP and S/MIME certificates Key lookup through key servers, LDAP and WKD	Compatible with the OpenPGP specification Suggests encryption and decryption settings from previous actions
Certificate concepts can be daunting for newcomers	Requires a separately installed Java Runtime Environment 17 or later Non-Oracle JREs need JAVA_HOME set or the ZIP package on Windows
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
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 October 2, 2026

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