Maybe a dumb question, but: If we all switch to Signal, then again one entity will have the power, right? As far as I understand it their protocol is not open i

Maybe a dumb question, but: If we all switch to Signal, then again one entity will have the power, right? As far as I understand it their protocol is not open in the sense that we can build custom clients and servers still interact with others on other servers (Like Matrix, or Email, or Mastodon)?