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Psi vs Dino: catalog facts
Psi	Dino
Free Free and open source under the GNU General Public License.	Free Free and open source under the GPL.
Windows, macOS, Linux	Linux
OMEMO, OTR and OpenPGP encryption via plugins Very flexible interface with multi-window and all-in-one modes	Clean desktop client for a federated protocol with OMEMO encryption Supports calls and file transfer, not only text
Last tagged release dates from 2020 Aimed at experienced users rather than newcomers	Linux focused; other platforms need third-party builds Behaviour depends on the server's feature support
Downloadable app	Downloadable app
Open source	Open source
License: GPL	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is 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 22, 2026

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