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MongooseIM vs Openfire: catalog facts
MongooseIM	Openfire
Free Free and open source.	Free Free and open source under the Apache License.
Self-hosted	Self-hosted
Clusters across multiple machines Fault tolerant Erlang design	Web-based administration console Works with any standard XMPP client
Aimed at large installations, which adds complexity for small setups Requires familiarity with server and cluster administration	Requires running and maintaining your own server Users need a separate XMPP client
Self-hosted	Self-hosted
Open source	Open source
License not stated	License: Apache-2.0
Not stated if an account is 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 1, 2026	Official website Full listing and sources Checked September 24, 2026

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