Mumble Web vs Spacebar
A side-by-side comparison of two self-hosted chat & communication options — licensing, setup difficulty, resource needs, and what each one replaces.
Spacebar
Self-hostable, open-source Discord-compatible chat backend
| Feature | Mumble Web | Spacebar |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 15 · At risk | 83 · Excellent |
| Category | Chat & Communication | Chat & Communication |
| License | ISC | AGPL-3.0 |
| Language | JavaScript | TypeScript |
| Setup difficulty | Medium | Hard |
| Min. RAM | 128 MB | 1,024 MB |
| Deployment | docker, bare-metal, source | docker, source |
| GitHub stars | ★ 738 | ★ 2,196 |
| First released | 2017 | 2021 |
| Replaces | Discord, TeamSpeak | Discord |
What are Mumble Web and Spacebar?
Mumble Web
Mumble Web is a browser-based client that connects to Mumble voice servers over WebSocket, removing the need for a native client. It brings Mumble voice chat to any device with a browser.
- Browser access to Mumble
- No native client needed
- Works on mobile browsers
- Lightweight WebSocket bridge
Spacebar
Spacebar is a free, open-source, self-hostable chat platform that is compatible with the Discord client and API. It lets communities run their own Discord-like server infrastructure.
- Discord-API compatible
- Works with existing Discord clients
- Self-hosted communities
- Voice and text channels
Mumble Web vs Spacebar: key differences
Mumble Web is written in JavaScript, while Spacebar is built with TypeScript. Licensing differs — ISC for Mumble Web versus AGPL-3.0 for Spacebar. Mumble Web is the lighter option, starting around 128 MB of RAM against 1,024 MB for Spacebar. Mumble Web is the more established project (first released 2017), while Spacebar arrived in 2021. Spacebar has the considerably larger community, at 2,196 GitHub stars versus 738.
Why pick each one
Choose Mumble Web if…
- Released under the ISC license
- First-class Docker support for quick deployment
- Written in JavaScript
- Tiny footprint — runs in 128 MB RAM
Watch out for
- Requires a Murmur server
- Voice quality depends on browser
Choose Spacebar if…
- Released under the AGPL-3.0 license
- First-class Docker support for quick deployment
- Active community (2.2k GitHub stars)
- Written in TypeScript
Watch out for
- Still in heavy development
- Feature gaps versus Discord
Frequently asked questions
Is Mumble Web or Spacebar better?
Neither is universally better. Spacebar has the larger community, while Mumble Web is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are Mumble Web and Spacebar free and open-source?
Yes. Mumble Web is licensed under ISC and Spacebar under AGPL-3.0. Both can be self-hosted at no software cost.
Can I run Mumble Web and Spacebar with Docker?
Mumble Web: yes. Spacebar: yes.
Which is lighter on resources, Mumble Web or Spacebar?
Mumble Web has the smaller minimum footprint at 128 MB of RAM, compared to about 1,024 MB for Spacebar. Real-world usage depends on library size, user count, and enabled features.