@humanhorseshoes @jim
Short answer : no, not just like that.
Slightly longer answer :
You could self-host the software on a server or find someone else that does it and would grant access to you thanks to it being open source, but the French state only offers its own hosted service ("Visio" etc.) to its employees.

@cos @jim
Short answer seems to be : scalability.
They have calling integrated in tchap, but don't advise it for calls with more than 2 people, they also have a jitsi-based service called "WebConf" which is advised for up to 50 people. Visio is up to 150 and Webinaire 350. All based on different technologies.