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Flexisip vs ejabberd: catalog facts
Flexisip	ejabberd
Best for: Running your own SIP VoIP service, especially for Linphone mobile users	Best for: Administrators running a large or custom XMPP or MQTT service
Free Free under the AGPL 3.0, with a paid proprietary licence for closed-source use.	Free Free and open source.
Self-hosted	Linux, Self-hosted
Push gateway delivers calls and messages to mobile apps in the background Proxy, presence and B2BUA in one suite All 4 strengths for Flexisip Push gateway delivers calls and messages to mobile apps in the background Proxy, presence and B2BUA in one suite Powers the public linphone.org SIP service Can run on embedded hardware	XMPP, MQTT and SIP in one server Over 400 XMPP extensions supported All 4 strengths for ejabberd XMPP, MQTT and SIP in one server Over 400 XMPP extensions supported Scales to millions of sessions on one node Regular releases since 2002
Requires SIP and VoIP knowledge to deploy Conference server is now a separate package	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: AGPL-3.0	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 Sources for Flexisip linphone.org/en/flexisip-sip-server github.com/BelledonneCommunications/flexisip Catalog checked October 2, 2026	Official website Full listing and sources Sources for ejabberd ejabberd.im Catalog checked September 23, 2026

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