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Gajim vs Kaidan: catalog facts
Gajim	Kaidan
Free Free and open source, funded by donations.	Free Free to download and use; developed within the KDE community.
Windows, Linux	Linux
Works with any XMPP provider and interoperates with other XMPP apps End-to-end encryption including OMEMO and OpenPGP	Works with any XMPP server instead of a single provider End-to-end encrypted messaging
Needs an XMPP account from a provider or your own server Contacts must also use XMPP to reach them	Developers note it still lacks some basic features Has known stability issues
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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