Metronome IM vs MongooseIM
A side-by-side comparison of two self-hosted matrix & xmpp options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Metronome IM | MongooseIM |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 42 · Fair | 85 · Excellent |
| Category | Matrix & XMPP | Matrix & XMPP |
| License | MIT | GPL-2.0 |
| Language | Lua | Erlang |
| Setup difficulty | Medium | Hard |
| Min. RAM | 128 MB | 1,024 MB |
| Deployment | docker, bare-metal, source | docker, bare-metal, source |
| GitHub stars | ★ 175 | ★ 1,760 |
| First released | 2012 | 2012 |
| Replaces | Slack, WhatsApp | Slack, WhatsApp |
What are Metronome IM and MongooseIM?
Metronome IM
Metronome IM is a fork of Prosody that focuses on additional features and out-of-the-box configuration for XMPP communication. It supports modern messaging extensions and microblogging.
- Prosody-based XMPP server
- Built-in PEP microblogging
- Modern XEP support
- Lightweight Lua implementation
MongooseIM
MongooseIM is an enterprise-grade XMPP server written in Erlang, designed for high scalability and reliability. It supports clustering, REST APIs, and modern messaging extensions.
- Built for massive scale
- Clustering and high availability
- GraphQL and REST admin APIs
- Modern XEP support
Metronome IM vs MongooseIM: key differences
Metronome IM is written in Lua, while MongooseIM is built with Erlang. Licensing differs — MIT for Metronome IM versus GPL-2.0 for MongooseIM. Metronome IM is the lighter option, starting around 128 MB of RAM against 1,024 MB for MongooseIM. MongooseIM has the considerably larger community, at 1,760 GitHub stars versus 175.
Why pick each one
Choose Metronome IM if…
- Released under the MIT license
- First-class Docker support for quick deployment
- Written in Lua
- Tiny footprint — runs in 128 MB RAM
Watch out for
- Smaller community than Prosody
- Niche project
Choose MongooseIM if…
- Released under the GPL-2.0 license
- First-class Docker support for quick deployment
- Active community (1.8k GitHub stars)
- Written in Erlang
Watch out for
- Complex deployment
- Requires Erlang knowledge to extend
Frequently asked questions
Is Metronome IM or MongooseIM better?
Neither is universally better. MongooseIM has the larger community, while Metronome IM is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are Metronome IM and MongooseIM free and open-source?
Yes. Metronome IM is licensed under MIT and MongooseIM under GPL-2.0. Both can be self-hosted at no software cost.
Can I run Metronome IM and MongooseIM with Docker?
Metronome IM: yes. MongooseIM: yes.
Which is lighter on resources, Metronome IM or MongooseIM?
Metronome IM has the smaller minimum footprint at 128 MB of RAM, compared to about 1,024 MB for MongooseIM. Real-world usage depends on library size, user count, and enabled features.