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Kaidan vs Gajim: catalog facts
Kaidan	Gajim
Free Free to download and use; developed within the KDE community.	Free Free and open source, funded by donations.
Linux	Windows, Linux
Works with any XMPP server instead of a single provider End-to-end encrypted messaging	Works with any XMPP provider and interoperates with other XMPP apps End-to-end encryption including OMEMO and OpenPGP
Developers note it still lacks some basic features Has known stability issues	Needs an XMPP account from a provider or your own server Contacts must also use XMPP to reach them
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 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.