5 self-hosted alternatives to MongooseIM (2026)

Mobile messaging platform with a focus on performance and scalability.

License: GPL-2.0 · Language: Erlang/Docker/K8S source code

XMPP instant messaging server.

GPL-2.0Erlang/Docker

Real time collaboration (RTC) server.

Apache-2.0Java

Feature-rich and easy to configure XMPP server.

MITLua

All-in-one Dockerized easy XMPP solution, including web admin and clients.

Apache-2.0Docker

XMPP server implementation in Java.

GPL-3.0Java