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Prosody vs MongooseIM: catalog facts
Prosody	MongooseIM
Free Free and open source under the MIT licence.	Free Free and open source.
Self-hosted	Self-hosted
Simple setup and low resource use Federates with other XMPP servers	Clusters across multiple machines Fault tolerant Erlang design
Requires a server and some administration Users need a separate XMPP client	Aimed at large installations, which adds complexity for small setups Requires familiarity with server and cluster administration
Self-hosted	Self-hosted
Open source	Open source
License: MIT	License not stated
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 September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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