SOGo vs Citadel
A side-by-side comparison of SOGo and Citadel — pricing, license, deployment, and where each tool wins.
SOGo
sogo.nu
SOGo offers multiple ways to access the calendaring and messaging data. CalDAV, CardDAV, GroupDAV, as well as ActiveSync, including native Outlook compatibility and Web interface.
Citadel
citadel.org
Groupware including email, calendar/scheduling, address books, forums, mailing lists, IM, wiki and blog engines, RSS aggregation and more.
| Feature | SOGo | Citadel |
|---|---|---|
| Pricing | Free | Free |
| Model | Open-source | Open-source |
| License | CC-BY-SA-3.0 | CC-BY-SA-3.0 |
| Deployment | Self-hosted | Self-hosted |
| Category | Groupware | Groupware |
| Self-hosted | ✓Yes | ✓Yes |
| Free tier | ✓Yes | ✓Yes |
Pick SOGo if…
- ✓You prefer SOGo's feature set or ecosystem fit.
Pick Citadel if…
- ✓You prefer Citadel's feature set or ecosystem fit.