I'm looking for a new app to organize guild's group chats.

So far I used Hangouts but it has some functions missing like there is no host/moderator in a group chat and no one can kick people and also it's linked to the google account and displays whatever name you entered there (mostly real-life names).
So I'm looking for a different chat app and would like to hear y'all opinions on what app would work best for this purpose. Thanks in advance!