A few years ago when we needed an on-prem chat tool (around the time Atlassian killed HipChat), rocket.chat had the benefit of being easy to set up. For Matrix

A few years ago when we needed an on-prem chat tool (around the time Atlassian killed HipChat), rocket.chat had the benefit of being easy to set up. For Matrix you needed a Synapse (Dendrite wasn't ready back then) backend, a Vector frontend, some arcane backend for authentication, and you had to connect everything together by hand, while rocket.chat had a docker-compose file you could add Keycloak to and spin everything up with a single command.