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MongooseIM vs ejabberd: catalog facts
MongooseIM	ejabberd
Free Free and open source.	Free Free and open source.
Self-hosted	Linux, Self-hosted
Clusters across multiple machines Fault tolerant Erlang design	XMPP, MQTT and SIP in one server Over 400 XMPP extensions supported
Aimed at large installations, which adds complexity for small setups Requires familiarity with server and cluster administration	More complex than servers built for small groups Erlang-based stack can be unfamiliar to admins
Self-hosted	Self-hosted
Open source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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