FluxBB vs Spectrum
A side-by-side comparison of two self-hosted forums & community options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
FluxBB
Fast, light and user-friendly forum application
VS
Spectrum
Open-source platform for building online communities
| Feature | FluxBB | Spectrum |
|---|---|---|
| Category | Forums & Community | Forums & Community |
| License | GPL-2.0 | BSD-3-Clause |
| Language | PHP | JavaScript |
| Setup difficulty | Easy | Hard |
| Min. RAM | 128 MB | 2,048 MB |
| Deployment | bare-metal, source | docker, bare-metal |
| GitHub stars | ★ 541 | ★ 10,837 |
| First released | 2008 | 2017 |
| Replaces | phpBB | Discord, Discourse |
Why pick each one
Choose FluxBB if…
- Released under the GPL-2.0 license
- Easy to set up — beginner-friendly
- Written in PHP
- Tiny footprint — runs in 128 MB RAM
Choose Spectrum if…
- Released under the BSD-3-Clause license
- First-class Docker support for quick deployment
- Mature project with 10.8k GitHub stars
- Written in JavaScript
Frequently asked questions
Is FluxBB or Spectrum better?
Neither is universally better. Spectrum has the larger community, while FluxBB is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are FluxBB and Spectrum free and open-source?
Yes. FluxBB is licensed under GPL-2.0 and Spectrum under BSD-3-Clause. Both can be self-hosted at no software cost.
Can I run FluxBB and Spectrum with Docker?
FluxBB: check the project docs for container support. Spectrum: yes.