Why doesn't TDW just create a private chat server using rocket.chat? Based on my limited research Rocket.chat is intuitive, user-friendly and has a small learning curve.
https://computingforgeeks.com/how-to-install-rocket-chat-server-on-debian-ubuntu/?amp
Honestly, if we created a GiveSendGo IOT fund our own chat server, I guarantee we could be up in a week. Right now, we have so many pedes on here creating chat groups that we're becoming divided.