Feng Office vs Citadel
A side-by-side comparison of two self-hosted groupware options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Feng Office
Web-based collaboration and project management suite
VS
Citadel
All-in-one groupware, mail and collaboration server
| Feature | Feng Office | Citadel |
|---|---|---|
| Category | Groupware | Groupware |
| License | AGPL-3.0 | GPL-3.0 |
| Language | PHP | C |
| Setup difficulty | Medium | Medium |
| Min. RAM | 512 MB | 512 MB |
| Deployment | bare-metal, source | bare-metal, source |
| GitHub stars | ★ 106 | ★ 100 |
| First released | 2007 | 1987 |
| Replaces | Basecamp, Microsoft Project | Microsoft Exchange, Microsoft 365 |
Why pick each one
Frequently asked questions
Is Feng Office or Citadel better?
Neither is universally better. Feng Office has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Feng Office and Citadel free and open-source?
Yes. Feng Office is licensed under AGPL-3.0 and Citadel under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Feng Office and Citadel with Docker?
Feng Office: check the project docs for container support. Citadel: check the project docs for container support.