# esl/MongooseIM

MongooseIM is Erlang Solutions' robust, scalable and efficient XMPP server, aimed at large installations. Specifically designed for enterprise purposes, it is fault-tolerant and can utilise the resources of multiple clustered machines.

Repository: https://github.com/esl/MongooseIM
Canonical: https://ross.abutalabs.com/products/mongooseim
Homepage: https://trymongoose.im
Language: Erlang
License: NOASSERTION
License Family: other
Topics: mongooseim, erlang, xmpp, jabber, messaging, chat, hacktoberfest
Last push: 2026-08-26T14:06:58+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 5472, "days_push": 7, "days_rel": 9, "gap_med": 69, "n_releases_24m": 10}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1750, forks 440 (observed 2026-08-28T04:05:31.135258+00:00)

## What it is
MongooseIM is a robust, scalable XMPP messaging server built in Erlang, designed for large enterprise instant messaging installations. It is fault-tolerant, supports clustering across multiple machines, and accepts client sessions over XMPP, REST API, SSE, WebSockets, and BOSH.

## Use cases
- run a self-hosted chat server for my app
- scale an XMPP messaging backend to millions of users
- build an enterprise instant messaging platform
- add real-time messaging with websocket support to my service
- cluster a chat server across multiple machines for fault tolerance
- connect mobile clients to a messaging backend via REST API

## When to choose
- you need a battle-tested, highly scalable XMPP server for large installations
- you require fault-tolerant clustering and horizontal scaling for chat workloads
- you want flexible client connectivity (XMPP, REST, SSE, WebSockets, BOSH)
- you need enterprise-grade messaging with monitoring and load testing tooling

## When to avoid
- you only need a small personal chat server with minimal setup
- your use case is not messaging or chat related
- you prefer a server in a more mainstream language with a larger community
- you need a lightweight single-node solution without clustering

## Facets
- artifact type: service
- maturity: active
- function: http-server, websocket, message-queue, monitoring, load-testing
- domain: messaging-platforms, self-hosted, backend
- platform: self-hosted, cross-platform
- tags: xmpp-server, jabber, instant-messaging, chat-server, erlang, clustered, fault-tolerant, bosh, sse, enterprise, messaging, real-time, linux, docker, kubernetes

## Member repositories
- esl/MongooseIM (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:31.135258+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:28:44.340377+00:00, confidence not recorded.
  - readme: https://github.com/esl/MongooseIM (fetched 2026-08-28T04:05:31.135258+00:00, sha dcecba5de18f)
  - homepage: https://trymongoose.im (fetched 2026-08-29T11:06:31.364220+00:00, sha 4a88c067bf90)
- Data as of 2026-08-30T08:39:29.467469+00:00.