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Siskin IM vs Prav: catalog facts
Siskin IM	Prav
Free Free; source code is published on GitHub.	Free Free to use; the cooperative accepts donations and paid memberships.
iOS	Android, iOS
OMEMO end-to-end encryption Audio and video calls over XMPP	Works with other XMPP clients, so there is no vendor lock-in Simple phone number registration
iPhone and iPad only Needs an XMPP account on a server	Still in public beta iOS install requires SideStore
Downloadable app	Downloadable app, Hosted service
Open source	Open source
License not stated	License: GPL-3.0-only
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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