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aTalk vs Prav: catalog facts
aTalk	Prav
Free Free and open source under the Apache-2.0 licence.	Free Free to use; the cooperative accepts donations and paid memberships.
Android	Android, iOS
OMEMO encryption including group chats DNSSEC and DANE connection security	Works with other XMPP clients, so there is no vendor lock-in Simple phone number registration
Android 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: Apache-2.0	License: GPL-3.0-only
Account needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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