Element X 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 | Element X | MongooseIM |
|---|---|---|
| Deploy effort | Read-the-docs project | Under-an-hour setup |
| Health score | 82 · Excellent | 85 · Excellent |
| Category | Matrix & XMPP | Matrix & XMPP |
| License | AGPL-3.0 | GPL-2.0 |
| Language | Swift | Erlang |
| Setup difficulty | Easy | Hard |
| Min. RAM | 64 MB | 1,024 MB |
| Deployment | bare-metal, source | docker, bare-metal, source |
| GitHub stars | ★ 947 | ★ 1,760 |
| First released | 2022 | 2012 |
| Replaces | WhatsApp, Signal | Slack, WhatsApp |
What are Element X and MongooseIM?
Element X
Element X is a rewritten, sliding-sync-powered Matrix client focused on speed and a streamlined mobile experience. It connects to any Matrix homeserver for chat and calls.
- Built on Matrix Rust SDK
- Very fast sync via sliding sync
- End-to-end encryption
- Native Element Call integration
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
Element X vs MongooseIM: key differences
Element X is written in Swift, while MongooseIM is built with Erlang. Licensing differs — AGPL-3.0 for Element X versus GPL-2.0 for MongooseIM. Element X is the lighter option, starting around 64 MB of RAM against 1,024 MB for MongooseIM. MongooseIM is the more established project (first released 2012), while Element X arrived in 2022. MongooseIM lists first-class Docker deployment; Element X does not.
Why pick each one
Choose Element X if…
- Released under the AGPL-3.0 license
- Easy to set up — beginner-friendly
- Written in Swift
- Tiny footprint — runs in 64 MB RAM
Watch out for
- Mobile-focused
- Requires a Matrix homeserver
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 Element X or MongooseIM better?
Neither is universally better. MongooseIM has the larger community, while Element X is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are Element X and MongooseIM free and open-source?
Yes. Element X is licensed under AGPL-3.0 and MongooseIM under GPL-2.0. Both can be self-hosted at no software cost.
Can I run Element X and MongooseIM with Docker?
Element X: check the project docs for container support. MongooseIM: yes.
Which is lighter on resources, Element X or MongooseIM?
Element X has the smaller minimum footprint at 64 MB of RAM, compared to about 1,024 MB for MongooseIM. Real-world usage depends on library size, user count, and enabled features.