| CARVIEW |
Select Language
HTTP/1.1 200 OK
Server: nginx/1.22.1
Date: Tue, 30 Dec 2025 10:23:46 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Connection: keep-alive
Content-Encoding: gzip
citadel.org
Meet the Citadel System.
Email, collaboration, groupware, and content management -
Meet the Citadel System.
Easy to install. Easy to use. 100% open source. No compromises.
Email, collaboration, groupware, and content management -
up and running in minutes, on your own hardware or in the cloud.
Powerful and flexible
Citadel is easy, versatile, and powerful, thanks to its exclusive "rooms" based architecture. No other platform seamlessly combines so many different features using this familiar and consistent metaphor.
Packed with features
- calendar/scheduling
- address books
- bulletin boards (forums)
- mailing list server
- instant messaging
- wiki and blog engines
- multiple domain support
- a powerful web interface
- rss aggregation
True open source
Citadel is 100% open source software using the GNU General Public License. It's not a crippled, cut-down version of some expensive "enterprise" edition. The software you download here is the very best available, and it's all free software.
There are no social media links here. Enjoy a friendly
Citadel community instead. Or go outside.