ejabberd is a robust, massively scalable real-time platform combining an XMPP server, MQTT broker, and SIP service. Written in Erlang by the ProcessOne team since 2002, it has powered messaging at WhatsApp, Nintendo Switch, the BBC, Facebook, Nokia, and hundreds of organizations worldwide.
ejabberd is pronounced "e-jabber-d". The "e" stands for Erlang, the runtime built for fault-tolerant distributed systems. "jabber" is the precursor to XMPP. "d" for daemon, the Unix term for a background process. Started in 2002 by Alexey Shchepin, it has been maintained and extended by ProcessOne ever since.
ejabberd is a true multi-protocol platform. Rather than bolting on secondary protocols, each one is a first-class citizen with full server-side support.
The open standard for real-time messaging, presence, and federation. XMPP's extensibility model (over 400 published protocol extensions) makes it adaptable to any use case, from secure enterprise chat to large-scale multiplayer gaming. ejabberd has high compliance with XMPP and every major extension.
A lightweight publish-subscribe protocol designed for constrained devices and low-bandwidth networks. ejabberd's built-in MQTT broker lets you connect IoT sensors, smart home devices, and telemetry pipelines to the same infrastructure as your messaging stack, without running a separate broker.
ejabberd includes a SIP service for voice calls, and supports Jingle, the XMPP extension for peer-to-peer multimedia sessions. Combined with WebSocket support, this makes ejabberd a natural integration point for browser-based voice and video using WebRTC stacks.
A distributed protocol for continuously merged, decentralized conversations. ejabberd's Matrix support brings interoperability with the Matrix ecosystem, enabling organizations to bridge their XMPP infrastructure with Matrix-based clients and federated rooms without operating a separate homeserver.
ejabberd's architecture was designed from the ground up for systems that cannot fail. Over two decades of production deployments have hardened every layer.
Tested at 2 million concurrent sessions on a single node. ejabberd uses consistent hashing for clustering, eliminating full data replication and keeping internode communication lean as you grow.
Erlang's "let it crash" philosophy means failures are isolated and recovered automatically. ejabberd runs hot upgrades without restarting, so your uptime is never sacrificed for a software update.
ejabberd ships with the features modern mobile and web apps depend on. Push notifications, multi-device sync, message archives, and WebSocket support are all built in, not afterthoughts.
ejabberd's modular architecture and powerful API let you extend behavior with minimal code. A full REST API and CLI tool give administrators fine-grained control over every aspect of the server.
ejabberd comes in three editions, from a fully open-source server you run yourself to a fully managed cloud platform. Compare all editions in detail →
ejabberd Community Server
The open-source server, freely available under the GPLv2 license. Self-hosted, community-supported, and maintained by ProcessOne with regular releases.
ejabberd Business Edition
Long-Term Support releases, enterprise SLA, priority security patches, and direct access to the ProcessOne engineering team. For organizations where downtime has real operational cost.
Fluux
All Business Edition features, fully managed by ProcessOne. No servers to run, no ops team needed. Focus on your product while we handle the infrastructure.
Talks and technical presentations by the ProcessOne engineers who build and maintain ejabberd.
Christophe Romain explains the Pubsub plugin system and how to leverage it to optimize ejabberd Pubsub for your own use cases.
How QuickCheck testing helps find bugs in ejabberd and improves the range and creativity of test cases covered automatically.
Christophe Romain talks about WebSockets and push notifications at SeaBeyond 2014.
Download the Community Server, explore the documentation, or contact us about the Business Edition and what it takes to run ejabberd at scale.
