So, a Beeper competitor?

Not really, they’re just speaking matrix natively. In theory this will help Beeper, since they won’t have to maintain a Rocket.chat bridge. In practice, I’ve tried to sign up to Beeper multiple times, but they never get back to me.

Same here. Just ended up rolling my own solution from the great open source out there.

I grabbed this resource from Beeper's landing page: https://github.com/spantaleev/matrix-docker-ansible-deploy

Is that what you're using?