XMPP
The open standard for real-time messaging
Full XMPP Core & IM support with 400+ extensions: MUC, MAM, PubSub, Carbons, Push, OMEMO and more. Federate with the global XMPP network out of the box.
A ProcessOne product · since 2002
The messaging server
that keeps real-time in control.
Built on open standards. Proven at WhatsApp scale. Sovereign by design.
ejabberd is the open-source XMPP server, MQTT broker and SIP service built in Erlang by ProcessOne, carrying mission-critical messaging for organisations that can't afford to lose control of their communications.
ejabberd.yml
## Listen on the standard XMPP ports
listen:
- port: 5222
module: ejabberd_c2s
- port: 5269
module: ejabberd_s2s_in
- port: 1883
module: mod_mqtt
## Storage and modules
default_db: sql
modules:
mod_mam: # message archive
mod_push: # mobile push
mod_pubsub: # publish-subscribe
mod_muc: # multi-user chatWe build the messaging infrastructure organisations rely on when downtime is not an option. Open source, open standards and twenty-two years of running in production. The same platform behind WhatsApp, Nintendo Switch and the BBC.
- In production since
- 2002
- Concurrent sessions
- 2M+
- XMPP extensions
- 400+
- Languages
- 28
22 years of mission-critical messaging
on a single node, measured in production
with MUC, MAM, PubSub, OMEMO and more
for the web admin and client tooling
Powering real-time messaging at
- Nintendo
- BBC
- Nokia
- Riot Games
- MLB
- Yandex
- Ubisoft
…and hundreds of organisations worldwide. See customers
Multi-protocol platform
The right protocol for every use case
One server, one operations story. Four interoperable protocols for messaging, IoT, voice and decentralised federation.
MQTT
Lightweight pub/sub for IoT at scale
Built-in MQTT 3.1.1 and 5.0 broker, sharing the same auth, persistence and clustering layer as the XMPP server. One platform, one operations story.
SIP / WebRTC
Voice, video and peer-to-peer multimedia
Integrated SIP gateway and STUN/TURN support for WebRTC calls. Combine signalling, presence and media relay in a single deployable platform.
Matrix
Decentralised, federated messaging
Native Matrix support brings interoperability between Matrix homeservers and the XMPP federation. Bridge ecosystems without a separate stack.
Built to survive anything
Rock-solid. Massively scalable. Infinitely extensible.
Modern
Multi-protocol XMPP, MQTT and SIP, with REST API, command-line tooling and mobile or web client libraries for iOS, Android and Web (Strophe, XMPPFramework, Smack).
Fault-Tolerant
Built on Erlang/OTP's “let-it-crash” philosophy. Live upgrades without downtime, all-active clustering and end-to-end delivery acknowledgments. No message left behind.
Massively Scalable
Two million concurrent sessions on a single node. Consistent-hashing clustering, memory-efficient session model, PubSub broadcast optimisation across the cluster.
Manageable
ejabberdctl CLI, REST API and live web admin. Automate everything from user provisioning and module loading to backup and rolling cluster upgrades.
Highly Versatile
Customisation hooks for messaging, gaming, healthcare, telecoms, IoT and AI agents. With built-in MQTT and SIP, ejabberd is a true real-time platform.
Very Modular
An extensible module API and hundreds of community contributions. Swap storage backends (PostgreSQL, MySQL, Redis, LDAP) and bolt on what you need.
Choose your deployment
One platform. Three ways to run it.
From a free open-source download to a fully managed cloud. Start with the Community release, scale with Business, or have ProcessOne run it for you.
Community Server
The full ejabberd platform under GPLv2. Self-host on your own infrastructure, with the global community behind you.
Free self-hosted, forever
- XMPP, MQTT, SIP, Matrix
- Clustering & federation
- REST API, CLI, web admin
- PostgreSQL, MySQL, Redis, LDAP
- Community support
Business Edition
Everything in Community, plus enterprise-grade performance modules, mobile push at scale, LTS releases with 3-year support and direct ProcessOne SLAs.
from €16,000 per year · 2-node cluster
- All Community features
- iOS / Android / WebPush at scale
- Advanced clustering & monitoring
- LTS releases (3-year support)
- Direct ProcessOne support
Fluux
All Business Edition features, fully managed by ProcessOne. No servers to run, no ops team needed. Custom domains, SLAs included.
from €200 per month
- All Business features
- Fully managed by ProcessOne
- Custom domains
- Automated upgrades & backups
- Production SLAs
Need a side-by-side comparison? Compare editions in detail
A solid choice
Six reasons teams pick ejabberd
- 01
Fully Open Source
Everyone has the freedom to use, audit and customise ejabberd, under the GPLv2 license. No vendor lock-in, no telemetry, no surprises.
- 02
Secure by default
TLS 1.3, modern cipher suites, SASL with SCRAM-SHA-256, end-to-end encryption via OMEMO. Security best practices baked into every release.
- 03
Flexible
A full module API to write custom plugins and modify behaviour, with a minimal amount of code. Hook into virtually any event in the server.
- 04
Interoperable
Compliant with XMPP, MQTT, SIP and Matrix standards and most extensions. Works with all major clients and federates with other servers.
- 05
Professionally maintained
Release engineering, QA and API stability handled by ProcessOne, with over 20 years of Erlang and real-time messaging expertise.
- 06
Warm & welcoming
A helpful, kind, global community. Our mission: help anyone use and build services on top of open real-time protocols.
Get started
Ready to deploy a real-time platform built to last?
Free, open source and running in production at WhatsApp scale. Grab the latest release, browse the docs or contribute on GitHub.