Citadel vs Twake Workplace
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?
Citadel
All-in-one groupware, mail and collaboration server
VS
Twake Workplace
Open-source digital workplace and collaboration suite
| Feature | Citadel | Twake Workplace |
|---|---|---|
| Category | Groupware | Groupware |
| License | GPL-3.0 | AGPL-3.0 |
| Language | C | TypeScript |
| Setup difficulty | Medium | Medium |
| Min. RAM | 512 MB | 2,048 MB |
| Deployment | bare-metal, source | docker, kubernetes |
| GitHub stars | ★ 100 | ★ 1,922 |
| First released | 1987 | 2019 |
| Replaces | Microsoft Exchange, Microsoft 365 | Microsoft Teams, Slack |
Why pick each one
Frequently asked questions
Is Citadel or Twake Workplace better?
Neither is universally better. Twake Workplace has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Citadel and Twake Workplace free and open-source?
Yes. Citadel is licensed under GPL-3.0 and Twake Workplace under AGPL-3.0. Both can be self-hosted at no software cost.
Can I run Citadel and Twake Workplace with Docker?
Citadel: check the project docs for container support. Twake Workplace: yes.