Robust, Scalable and Extensible Realtime Server
using XMPP, MQTT and SIP

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ejabberd is a Rock Solid, Massively Scalable,
Infinitely Extensible Realtime Server


  • Backend integration with REST API and ejabberdctl command-line tool
  • Mobile libraries for iOS: XMPPFramework
  • Mobile libraries for Android: Smack, Retrofit
  • Web library with WebSocket support and fallback to BOSH support: Strophe
  • Open Source software: GitHub


  • Runs in a cluster out of the box
  • All nodes are active: platform built on top of ejabberd supports fault tolerance mechanisms
  • Upgradable while it is running: unmatched uptime
  • No message lost: for each message, the XMPP server checks the status of delivery with an acknowledgment provided by the mobile app
  • Mobile network disconnections managed at XMPP server level

Massively Scalable

  • Massive concurrency: 2 000 000 users on 1 node
  • Cluster with consistent hashing to get rid of data replication, resulting in more effective approach in internode communications
  • Memory reduction of the data kept in memory for each connected user
  • PubSub broadcast optimisation with reduction of internal data transfer in cluster setup


ejabberd comes with a very powerful command-line tool that allows controlling most of the aspects of the server. Most common operations can be automated to make it a pleasure for admins to work with.

Highly Versatile

ejabberd offers many customization hooks to adapt it easily to various use cases. This makes it the server of choice no matter which area you are working in: mobile messaging, gaming, internet of things, it can do it all.

Very Modular

ejabberd code is extremely modular and can be extended through a powerful API. Contributors are using the API to provide tens of third-party extensions to ejabberd to enhance and tailor its behavior.

A Solid Choice


Fully Open Source

Everyone has the freedom to use and customize the ejabberd code, according to the GPLv2 license.



Best practices are baked right into the server. Secure code runs in a trusted environment, with all SSL / TLS encryption best practices.



ejabberd offers a full API to write your custom plugins and modify the server so that it works exactly as you wish, with a minimal amount of code.



ejabberd is compliant with the XMPP, MQTT and SIP standards and most of the available extensions. It can be leveraged with all the available XMPP, MQTT and SIP clients and libraries and can federate with other servers.


Professionally Maintained

Professional release engineers manage the ejabberd release cycle, QA the full stack, and keep APIs stable. The core team has impressive credentials and 16 years of Erlang development under their belt.


Warm & Welcoming

ejabberd’s helpful, kind, and supportive community spans the globe. ejabberd’s mission is to empower everyone to use and build services on top of the XMPP, MQTT and SIP protocols.



Deep Dive Into ejabberd Pubsub Implementation

Christophe Romain goes into the details of ejabberd Pubsub implementation. He explains the Pubsub plugin systems and how to leverage it to optimize ejabberd Pubsub for your own use cases.


Property-based testing of XMPP: generate your tests automatically

The talk explains how Quickcheck testing approach can help find bugs in ejabberd and improved the range (and the creativity) of the test cases covered.


Web Push Notifications with Websockets - SeaBeyond 2014

Christophe Romain talks about websockets at SeaBeyond 2014.