Discord alternatives are complicated, because Discord is conceptual bullshit. It started as voice communication, yet became popular for the text communication. So you won't find a good replacement (unless something new created in particular to mimic discord), because the things it now provides are better handled by seperate applications. PS: ~~OBS should already work on it's own, without a dedicated webserver on your side. Basically every media program (also browser) should be able to handle streams~~ OBS' WHIP (WebRTC-HTTP Ingestion) support should allow direct connection to web browsers. (I'll will take a look at it when I'm home)