I think there's a lot of "open core" stuff like Sentry, Tailscale (I think?), or Gitlab. Where "enough" of the house is given away in theory for you to do it yourself (but why would you do that?)

Metabase is another company I knew where they do this, but I don't know how successful they are (their hosting costs start at "way too high considering how easy the thing is to spin up", which was great for me at $PREV_JOB I suppose but)