ircu2 vs Mumble
A side-by-side comparison of two self-hosted chat & communication options — licensing, setup difficulty, resource needs, and what each one replaces.
Mumble
Low-latency, high-quality voice chat application
| Feature | ircu2 | Mumble |
|---|---|---|
| Deploy effort | Read-the-docs project | Under-an-hour setup |
| Health score | 51 · Fair | 92 · Excellent |
| Category | Chat & Communication | Chat & Communication |
| License | GPL-2.0 | BSD-3-Clause |
| Language | C | C++ |
| Setup difficulty | Medium | Easy |
| Min. RAM | 64 MB | 128 MB |
| Deployment | bare-metal, source | docker, bare-metal, binary |
| GitHub stars | ★ 64 | ★ 8,303 |
| First released | 1996 | 2005 |
| Replaces | Discord, Slack | Discord, TeamSpeak, Ventrilo |
What are ircu2 and Mumble?
ircu2
ircu2 (ircd-undernet) is the IRC server daemon developed for and used by the Undernet IRC network. It can be self-hosted to run an IRC network and supports a feature-rich channel and server model.
- IRC server used by Undernet
- Feature-rich channel model
- Lightweight C daemon
Mumble
Mumble is an open-source, low-latency voice chat application primarily designed for gaming and group voice communication. The Murmur server component can be self-hosted for private voice channels.
- Very low audio latency
- Positional audio for gaming
- Encrypted voice connections
- Lightweight Murmur server
ircu2 vs Mumble: key differences
Ircu2 is written in C, while Mumble is built with C++. Licensing differs — GPL-2.0 for ircu2 versus BSD-3-Clause for Mumble. Ircu2 is the lighter option, starting around 64 MB of RAM against 128 MB for Mumble. Ircu2 is the more established project (first released 1996), while Mumble arrived in 2005. Mumble has the considerably larger community, at 8,303 GitHub stars versus 64. Mumble lists first-class Docker deployment; ircu2 does not.
Why pick each one
Choose ircu2 if…
- Released under the GPL-2.0 license
- Written in C
- Tiny footprint — runs in 64 MB RAM
Choose Mumble if…
- Excellent voice quality
- Tiny resource footprint
Watch out for
- Voice-focused, limited text features
- Dated client UI
Frequently asked questions
Is ircu2 or Mumble better?
Mumble is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider ircu2 if its specific feature set fits your needs better.
Are ircu2 and Mumble free and open-source?
Yes. ircu2 is licensed under GPL-2.0 and Mumble under BSD-3-Clause. Both can be self-hosted at no software cost.
Can I run ircu2 and Mumble with Docker?
ircu2: check the project docs for container support. Mumble: yes.
Which is lighter on resources, ircu2 or Mumble?
ircu2 has the smaller minimum footprint at 64 MB of RAM, compared to about 128 MB for Mumble. Real-world usage depends on library size, user count, and enabled features.