FreeSWITCH vs irssi
A side-by-side comparison of two self-hosted chat & communication options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
| Feature | FreeSWITCH | irssi |
|---|---|---|
| Category | Chat & Communication | Chat & Communication |
| License | MPL-2.0 | GPL-2.0 |
| Language | C | C |
| Setup difficulty | Hard | Medium |
| Min. RAM | 512 MB | 32 MB |
| Deployment | docker, bare-metal, source | bare-metal, binary, source |
| GitHub stars | ★ 5,069 | ★ 3,129 |
| First released | 2006 | 1999 |
| Replaces | Twilio, Asterisk | Slack |
Why pick each one
Choose FreeSWITCH if…
- Released under the MPL-2.0 license
- First-class Docker support for quick deployment
- Mature project with 5.1k GitHub stars
- Written in C
Choose irssi if…
- Released under the GPL-2.0 license
- Active community (3.1k GitHub stars)
- Written in C
- Tiny footprint — runs in 32 MB RAM
Frequently asked questions
Is FreeSWITCH or irssi better?
Neither is universally better. FreeSWITCH has the larger community, while irssi is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are FreeSWITCH and irssi free and open-source?
Yes. FreeSWITCH is licensed under MPL-2.0 and irssi under GPL-2.0. Both can be self-hosted at no software cost.
Can I run FreeSWITCH and irssi with Docker?
FreeSWITCH: yes. irssi: check the project docs for container support.