Compare software

PGPTool vs Kleopatra: catalog facts
PGPTool	Kleopatra
Free Free to download and use.	Free Free and open source.
Windows, macOS, Linux	Linux
Compatible with the OpenPGP specification Suggests encryption and decryption settings from previous actions	Handles both OpenPGP and S/MIME certificates Key lookup through key servers, LDAP and WKD
Requires a separately installed Java Runtime Environment 17 or later Non-Oracle JREs need JAVA_HOME set or the ZIP package on Windows	Certificate concepts can be daunting for newcomers
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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