Fractal 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 | Fractal | MongooseIM |
|---|---|---|
| Deploy effort | Read-the-docs project | Under-an-hour setup |
| Category | Matrix & XMPP | Matrix & XMPP |
| License | GPL-3.0 | GPL-2.0 |
| Language | Rust | Erlang |
| Setup difficulty | Easy | Hard |
| Min. RAM | 256 MB | 1,024 MB |
| Deployment | binary, source | docker, bare-metal, source |
| GitHub stars | ★ 900 | ★ 1,760 |
| First released | 2017 | 2012 |
| Replaces | Slack, Discord | Slack, WhatsApp |
What are Fractal and MongooseIM?
Fractal
Fractal is a Matrix client designed for the GNOME desktop and written in Rust with GTK. It supports end-to-end encryption, multiple accounts, and integrates cleanly with the GNOME ecosystem.
- GNOME-native GTK interface
- End-to-end encryption
- Multi-account support
- Adaptive layout
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
Fractal vs MongooseIM: key differences
Fractal is written in Rust, while MongooseIM is built with Erlang. Licensing differs — GPL-3.0 for Fractal versus GPL-2.0 for MongooseIM. Fractal is the lighter option, starting around 256 MB of RAM against 1,024 MB for MongooseIM. MongooseIM is the more established project (first released 2012), while Fractal arrived in 2017. MongooseIM lists first-class Docker deployment; Fractal does not.
Why pick each one
Choose Fractal if…
- Released under the GPL-3.0 license
- Easy to set up — beginner-friendly
- Written in Rust
- Tiny footprint — runs in 256 MB RAM
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 Fractal or MongooseIM better?
Neither is universally better. MongooseIM has the larger community, while Fractal is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are Fractal and MongooseIM free and open-source?
Yes. Fractal is licensed under GPL-3.0 and MongooseIM under GPL-2.0. Both can be self-hosted at no software cost.
Can I run Fractal and MongooseIM with Docker?
Fractal: check the project docs for container support. MongooseIM: yes.
Which is lighter on resources, Fractal or MongooseIM?
Fractal has the smaller minimum footprint at 256 MB of RAM, compared to about 1,024 MB for MongooseIM. Real-world usage depends on library size, user count, and enabled features.