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aTalk vs Conversations: catalog facts
aTalk	Conversations
Free Free and open source under the Apache-2.0 licence.	Freemium Free and open source. The Google Play build is a paid way to support development.
Android	Android
OMEMO encryption including group chats DNSSEC and DANE connection security	Federated protocol, so you choose or run the server OMEMO encryption with a mature, well-reviewed implementation
Android only Needs an XMPP account on a server	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: Apache-2.0	License: GPL-3.0
Account 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 October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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