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Synapse vs SAMA: catalog facts
Synapse	SAMA
Free Free under the AGPL; Element sells commercial licenses, support subscriptions and ESS Pro.	Free Free and open source under the GPL-3.0 licence.
Self-hosted	Web, Self-hosted
Reference Matrix homeserver maintained by Element Works with any Matrix client	Server, web client and Flutter client are all open source End-to-end encryption and clustering included
Running a homeserver takes server administration work No support from Element without a paid subscription	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: AGPL-3.0	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 September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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