ircu2 vs WeeChat
A side-by-side comparison of two self-hosted chat & communication options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | ircu2 | WeeChat |
|---|---|---|
| Deploy effort | Read-the-docs project | Read-the-docs project |
| Health score | 51 · Fair | 88 · Excellent |
| Category | Chat & Communication | Chat & Communication |
| License | GPL-2.0 | GPL-3.0 |
| Language | C | C |
| Setup difficulty | Medium | Medium |
| Min. RAM | 64 MB | 64 MB |
| Deployment | bare-metal, source | bare-metal, binary, source |
| GitHub stars | ★ 64 | ★ 3,393 |
| First released | 1996 | 2003 |
| Replaces | Discord, Slack | Slack |
What are ircu2 and WeeChat?
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
WeeChat
WeeChat is a fast, lightweight chat client that runs in the terminal and supports IRC and many other protocols through plugins. Its relay protocol allows remote clients to connect to a persistent session.
- Terminal interface
- Scriptable in many languages
- Relay protocol for remote clients
- Highly extensible
ircu2 vs WeeChat: key differences
Both projects are written in C. Licensing differs — GPL-2.0 for ircu2 versus GPL-3.0 for WeeChat. Ircu2 is the more established project (first released 1996), while WeeChat arrived in 2003. WeeChat has the considerably larger community, at 3,393 GitHub stars versus 64.
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 WeeChat if…
- Released under the GPL-3.0 license
- Active community (3.4k GitHub stars)
- Written in C
- Tiny footprint — runs in 64 MB RAM
Frequently asked questions
Is ircu2 or WeeChat better?
Neither is universally better. WeeChat has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are ircu2 and WeeChat free and open-source?
Yes. ircu2 is licensed under GPL-2.0 and WeeChat under GPL-3.0. Both can be self-hosted at no software cost.
Can I run ircu2 and WeeChat with Docker?
ircu2: check the project docs for container support. WeeChat: check the project docs for container support.