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Psi vs Movim: catalog facts
Psi	Movim
Free Free and open source under the GNU General Public License.	Free Free and open source under the AGPL-3.0, funded by donations.
Windows, macOS, Linux	Web, Self-hosted
OMEMO, OTR and OpenPGP encryption via plugins Very flexible interface with multi-window and all-in-one modes	Uses standard XMPP and talks to other XMPP clients Chat, feeds and video calls in one web interface
Last tagged release dates from 2020 Aimed at experienced users rather than newcomers	Self-hosting needs PostgreSQL and some setup Largely maintained by one developer
Downloadable app	Web application, Self-hosted
Open source	Open source
License: GPL	License: AGPL-3.0
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
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.