ejabberd

ejabberd
Name	ejabberd
Developer	ProcessOne
Released	2002
Programming language	Erlang
Operating system	Cross-platform
License	GPL / Commercial

ejabberd

ejabberd is a robust, scalable XMPP server written in Erlang designed for instant messaging and presence. It supports federation, clustering, and a modular architecture enabling extensibility for real-time communication, conference systems, and machine-to-machine messaging. Widely adopted in telecommunications, education, and enterprise deployments, ejabberd interoperates with standards-based XMPP clients and gateways.

Overview

ejabberd implements the XMPP protocol and complements standards from the Internet Engineering Task Force such as Extensible Messaging and Presence Protocol specifications used by projects and organizations like Google, Facebook, WhatsApp, Microsoft, Cisco Systems, Apple Inc., Amazon (company), IBM, Oracle Corporation, GitHub, Red Hat, Mozilla Firefox, Mozilla Foundation, Debian, Ubuntu (operating system), Fedora (operating system), CentOS, SUSE, OpenBSD, FreeBSD, NetBSD, Solaris (operating system), ARM Ltd., Intel, AMD, ARM architecture and standards bodies like the IETF and W3C. It integrates with directory services and databases commonly used by institutions such as MIT, Stanford University, Harvard University, Cornell University, Oxford University, Cambridge University, ETH Zurich, École Polytechnique Fédérale de Lausanne, National University of Singapore, Tsinghua University, Peking University, and companies like Twitter, LinkedIn, Slack Technologies, Zoom Video Communications, Atlassian, Salesforce, SAP SE, Siemens, Ericsson, Nokia, Huawei, ZTE.

Features

ejabberd provides XMPP core features and numerous extensions including multi-user chat, publish-subscribe, message archive management, and stream management. It supports authentication backends such as LDAP, Active Directory, Kerberos, and integrates with databases like PostgreSQL, MySQL, MariaDB, SQLite, Mnesia and caching layers including Redis. For compliance and analytics it offers logging, message archiving, and integration with systems like ELK stack, Prometheus, Grafana, Splunk, Datadog, New Relic, Sentry, PagerDuty. It includes clustering and high-availability features leveraged by carriers and operators such as Verizon, AT&T, T-Mobile, Vodafone, Orange S.A., Telefónica, Deutsche Telekom.

Architecture and Components

ejabberd's Erlang runtime and OTP supervision model align with systems built by organizations like Ericsson and WhatsApp to achieve concurrency and fault-tolerance. Core components include the XMPP router, MUC component, pubsub engine, gateway modules, and modules for XEPs such as message archive management and roster management. It interoperates with network and transport technologies from vendors like Juniper Networks, Cisco Systems, Arista Networks, Cumulus Networks, Broadcom Inc., and cloud platforms including Amazon Web Services, Google Cloud Platform, Microsoft Azure, DigitalOcean, IBM Cloud. Monitoring and orchestration often use Kubernetes, Docker, Ansible, Chef (software), Puppet (software), Terraform, Helm (software), alongside CI/CD tools like Jenkins, GitLab CI, CircleCI, Travis CI.

Deployment and Configuration

Deployment scenarios range from single-node setups to multi-datacenter clusters using load balancers from F5 Networks, HAProxy, NGINX, and Envoy (software). Administrators use configuration management systems and continuous deployment pipelines adopted by institutions such as NASA, European Space Agency, National Aeronautics and Space Administration, CERN, Los Alamos National Laboratory, Lawrence Berkeley National Laboratory, and enterprises like Goldman Sachs, JPMorgan Chase, Morgan Stanley, Bank of America. Authentication and identity federation integrate with OAuth, OpenID Connect, SAML 2.0, Shibboleth, and enterprise identity providers like Okta, Ping Identity, OneLogin. Backups and storage use solutions from NetApp, EMC Corporation, Dell Technologies, Hewlett Packard Enterprise, and object stores like Amazon S3.

Security and Compliance

Security features include TLS, SASL, certificate management, federation controls, and rate-limiting suitable for regulated sectors including healthcare and finance. Compliance mapping often references standards and regulations such as HIPAA, GDPR, PCI DSS, SOC 2, ISO/IEC 27001 and is integrated into audits by firms like Deloitte, PwC, KPMG, Ernst & Young. Cryptographic tooling interoperates with libraries and tools from OpenSSL, GnuPG, LibreSSL, Let's Encrypt and key management systems by HashiCorp, AWS Key Management Service, Azure Key Vault, Google Cloud KMS.

History and Development

ejabberd originated in the early 2000s and evolved alongside XMPP developments and deployments by large-scale systems like AOL, ICQ, Yahoo!, Skype Technologies, RIM (Research In Motion), BlackBerry Limited, LINE Corporation, WeChat, Tencent Holdings. Its development has been supported by commercial steward ProcessOne and contributors from academic and industrial institutions such as École Polytechnique, INRIA, CNRS, Google Summer of Code, and open-source communities on platforms like GitHub, GitLab, SourceForge. Release management and versioning practices mirror those of projects like Linux kernel, Apache HTTP Server, PostgreSQL, Erlang/OTP.

Reception and Use Cases

ejabberd is used for chat services, IoT messaging, customer support chat, and multiplayer game communication by companies and projects including WhatsApp, Telegram (software), Signal (software), Discord (software), Minecraft, Fortnite, Epic Games, Unity Technologies, Electronic Arts, Ubisoft, Riot Games, as well as educational platforms at MIT OpenCourseWare, Coursera, edX, and government projects in municipalities like New York City, London, Paris, Berlin, Tokyo for public service messaging. Its scalability and extensibility have been cited in case studies by ACM, IEEE, USENIX, OSS conferences and adopted by telecommunications carriers, social networks, universities, and enterprises worldwide.

Category:Instant messaging