I think the info from the OP was about HumHub; I downloaded the free version and it appears to be a solution you can install and run from your own server; no third party needed.

Awesome, is it difficult to install

Appears rather simple.  The free version does not have chat rooms but would be a test to see how easy to integrate into UNA.  If you like, I can install on your server some time this week if you would like to test FreiChat.

Yes please, when u have free time, so I can test it, thanks!