MongooseIM

Scalable open source XMPP instant messaging server

About MongooseIM

MongooseIM is a free, open source instant messaging server built on Erlang and the XMPP protocol, designed for performance and horizontal scalability across data centres. It supports group chat, seamless device switching, delivery confirmation, push notifications through MongoosePush, and voice and video signalling, with a GraphQL API and TOML configuration for operators. Businesses use it as the messaging backend for chat products that must handle thousands to millions of concurrent users reliably.

MongooseIM website preview

Live preview of erlang-solutions.com via the WordPress mShots service — it can take a few seconds to generate on a first visit.

MongooseIM: strengths & things to check

Strengths

Completely free to use — this directory lists no paid plan for it.
Covers xmpp, instant messaging, erlang, open source, server — see the focus areas listed in its key facts.
Has 6 close alternatives in the same category on this page, so switching or comparing is easy.

Things to check

Free tools can change their model or shut down — avoid locking critical work into it without an export path.
Current plan prices are not listed here (they change too often to print reliably) — confirm the exact price on the official site.
It is one of 565 tools in the Communication & Collaboration category here — compare it against the alternatives below before you commit.

Derived from this listing's own data (pricing model, focus areas and category) — not a hands-on review score.

MongooseIM pricing

Pricing model	Free — listed in this directory as a free tool, with no paid plan required to use it.
Free access	Yes — fully free
Current plan prices	Listed on the official site — prices change, so this directory links out instead of printing a number that may already be stale.
Official site	erlang-solutions.com

MongooseIM key facts

Category: Communication & Collaboration
Pricing: Free — listed in this directory as a free tool, with no paid plan required to use it.
Focus areas: xmpp, instant messaging, erlang, open source, server
Official site: erlang-solutions.com

MongooseIM FAQ

How much does MongooseIM cost?

Free — listed in this directory as a free tool, with no paid plan required to use it. Current plans and prices are listed on the official site (erlang-solutions.com).

What is MongooseIM used for?

Scalable open source XMPP instant messaging server Its focus areas in the Communication & Collaboration category: xmpp, instant messaging, erlang, open source, server.

Where can I try MongooseIM?

On its official site, erlang-solutions.com — the Visit Official Site button above goes straight there.

MongooseIM vs alternatives

	MongooseIM	Openfire	ejabberd	Ergo
Pricing	Free — listed in this directory as a free tool, with no paid plan required to use it.	Free — listed in this directory as a free tool, with no paid plan required to use it.	Freemium — a free tier lets you start, and paid plans are available if you need more.	Free — listed in this directory as a free tool, with no paid plan required to use it.
Focus areas	xmpp, instant messaging, erlang, open source, server	xmpp, chat, server, self hosted, open source	xmpp, messaging, mqtt, server	irc, chat, server, self hosted, open source
Official site	erlang-solutions.com	igniterealtime.org	ejabberd.im	ergo.chat
Directory status	Listed	Listed	Listed	Listed

Side-by-side from each listing's own directory data. Full alternative cards are below.

About the Communication & Collaboration category

Chat, video meetings, and messaging apps that keep teams connected. The Communication & Collaboration category on Tools Hub currently lists 565 tools. Alongside MongooseIM, it includes GlobaLeaks, OpenSMTPD, diaspora*, Libervia.

FreeCommunication & Collaborationxmppinstant-messagingerlangopen-sourceserver

Alternatives to MongooseIM

Tools in the same Communication & Collaboration category that share focus areas with MongooseIM — worth comparing before you commit:

Communication & Collaboration

Openfire

Real time collaboration server built on XMPP

Freexmppchatserverself-hosted

Communication & Collaboration

ejabberd

Robust, scalable, extensible realtime platform: XMPP, MQTT and SIP in one server

Freemiumxmppmessagingmqttserver

Communication & Collaboration

Ergo

Modern IRC server software for communities

Freeircchatserverself-hosted

Communication & Collaboration

OpenSIPS

Open-source SIP proxy and server for voice and video

Freesipvoiptelephonyopen-source

Communication & Collaboration

Prosody IM

A modern XMPP communication server that is easy to set up

Freexmppchatserverself-hosted

Communication & Collaboration

Snikket

Simple, secure and private messaging

Freemessagingxmppopen-sourceself-hosted

More in Communication & Collaboration

Comparing tools in the Communication & Collaboration category? These related listings are worth a look: GlobaLeaks — Free, open-source whistleblowing software for secure reporting platforms; OpenSMTPD — Free SMTP server implementation from the OpenBSD project; diaspora* — Decentralized social network where you own your data.