Customisable Enterprise Instant Messaging Server MongooseIM

MongooseIM is a robust, scalable, open-source XMPP server designed for enterprise-grade instant messaging at massive scale.

🚀 Overview

MongooseIM is a highly scalable, fault-tolerant instant messaging server built on Erlang by Erlang Solutions, supporting XMPP and other protocols for real-time communication.

It solves the problem of delivering reliable, high-performance messaging for large user bases, handling millions of concurrent users across clustered nodes with features like dynamic domain management, seamless multi-device switching, and automatic scaling.

It's built for enterprises, developers, and organizations in sectors like healthcare, finance, customer service, and social platforms who need customizable, secure, and compliant communication infrastructure.

Erlang Solutions developed it to leverage Erlang/OTP's concurrency and distribution strengths for production-ready XMPP deployments, evolving from ejabberd with enterprise enhancements.

✨ Key Features

Massive scalability with clustering, CETS distributed storage, and autoscaler for dynamic cloud resource adjustment (handles billions of users)
Multi-protocol support: XMPP, REST/GraphQL APIs, WebSockets, SSE, BOSH, MQTT, AMQP
Security & compliance: End-to-end encryption, TLS 1.3, FAST auth, FIPS 140-2, GDPR-ready
Push notifications via MongoosePush for mobile (iOS/Android)
Integrated WebRTC via MongooseICE for voice/video calls
DevOps tools: Prometheus metrics, health checks, TOML config, Docker/Helm deployment
Optional: Recent additions like RabbitMQ event pushing (v6.5), CockroachDB support (v6.3)

🛠 Tech Stack

Backend: Erlang/OTP (primary), Elixir (MongooseICE)
Build: rebar3
Database: Mnesia (default), PostgreSQL, MySQL, SQLite, CockroachDB, Redis
Auth: XMPP SASL mechanisms, FAST, external (OAuth, etc.)
Hosting: Self-hosted, Docker, Kubernetes (Helm chart), OS packages (Ubuntu, Debian, CentOS)