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Dino vs Psi: catalog facts
Dino	Psi
Free Free and open source under the GPL.	Free Free and open source under the GNU General Public License.
Linux	Windows, macOS, Linux
Clean desktop client for a federated protocol with OMEMO encryption Supports calls and file transfer, not only text	OMEMO, OTR and OpenPGP encryption via plugins Very flexible interface with multi-window and all-in-one modes
Linux focused; other platforms need third-party builds Behaviour depends on the server's feature support	Last tagged release dates from 2020 Aimed at experienced users rather than newcomers
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL
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 22, 2026	Official website Full listing and sources Checked September 24, 2026

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