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aTalk vs another.im: catalog facts
aTalk	another.im
Free Free and open source under the Apache-2.0 licence.	Free Free and open source under the GPL 3.0 licence.
Android	Android, Web
OMEMO encryption including group chats DNSSEC and DANE connection security	Uses the open, federated XMPP protocol Aims for consistent features across platforms
Android only Needs an XMPP account on a server	Little documentation on the project website Requires an XMPP account to chat
Downloadable app	Downloadable app, Web application
Open source	Open source
License: Apache-2.0	License: GPL-3.0-only
Account needed	Account 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 October 2, 2026

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