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Psi vs Conversations: catalog facts
Psi	Conversations
Free Free and open source under the GNU General Public License.	Freemium Free and open source. The Google Play build is a paid way to support development.
Windows, macOS, Linux	Android
OMEMO, OTR and OpenPGP encryption via plugins Very flexible interface with multi-window and all-in-one modes	Federated protocol, so you choose or run the server OMEMO encryption with a mature, well-reviewed implementation
Last tagged release dates from 2020 Aimed at experienced users rather than newcomers	Feature availability depends on what the chosen server supports Paid on Google Play, though free builds exist on F-Droid
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.