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aTalk vs BombusMod: catalog facts
aTalk	BombusMod
Free Free and open source under the Apache-2.0 licence.	Free Free and open source under the GPL-2.0 licence.
Android	Android
OMEMO encryption including group chats DNSSEC and DANE connection security	Works with any XMPP server Long-running project with an extensive feature set
Android only Needs an XMPP account on a server	Website and developer documentation are in Russian Requires an XMPP account from a server of your choice
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: GPL-2.0
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.