This is just DDGs auto generated answer so I can't be sure this is true, but what I do know is that Signal has a CEO. Our global communications SHOULD NOT HAVE A FUCKING CEO. AND THEY SHOULD NOT BE BASED IN FASCIST USA
Discussion
If you want something cryptographically equivalent, that allows large groups, with no central server, no CEO, no pay packages, and the ability to move servers, I believe that this is the only option.
It's early days, but this protocol is getting rolled out in several apps beside's whitenoise, like Xchat - https://github.com/0xchat-app/xchat-app-main