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Kleopatra vs PGPony: catalog facts
Kleopatra	PGPony
Free Free and open source.	Free Free, with the source published under the Apache-2.0 licence.
Linux	Windows, macOS, Linux, Android, iOS
Handles both OpenPGP and S/MIME certificates Key lookup through key servers, LDAP and WKD	Hardware key support over NFC with on-card key generation Interoperable with GnuPG and supports OpenPGP v6
Certificate concepts can be daunting for newcomers	Young project compared with OpenKeychain or GnuPG Post-quantum keys need recipients with compatible software
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: Apache-2.0
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.