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Gajim vs Psi: catalog facts
Gajim	Psi
Free Free and open source, funded by donations.	Free Free and open source under the GNU General Public License.
Windows, Linux	Windows, macOS, Linux
Works with any XMPP provider and interoperates with other XMPP apps End-to-end encryption including OMEMO and OpenPGP	OMEMO, OTR and OpenPGP encryption via plugins Very flexible interface with multi-window and all-in-one modes
Needs an XMPP account from a provider or your own server Contacts must also use XMPP to reach them	Last tagged release dates from 2020 Aimed at experienced users rather than newcomers
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL
Account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
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.