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MongooseIM vs SAMA: catalog facts
MongooseIM	SAMA
Free Free and open source.	Free Free and open source under the GPL-3.0 licence.
Self-hosted	Web, Self-hosted
Clusters across multiple machines Fault tolerant Erlang design	Server, web client and Flutter client are all open source End-to-end encryption and clustering included
Aimed at large installations, which adds complexity for small setups Requires familiarity with server and cluster administration	Uses its own protocol, so it does not interoperate with XMPP or Matrix Small project with a limited community
Self-hosted	Web application, Self-hosted
Open source	Open source
License not stated	License: GPL-3.0
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 October 2, 2026

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