The difference between this and openapi code generator (I think) is that I made a few specific decisions in the builtin templates that help get internal business apps off the ground faster. But since it's designed around a template system you could do whatever you want with it. And of course openapi is much more mature just generally speaking.

It's different from PostgREST in that it doesn't dynamically read schemas from the DB during the application server runtime. You generate an application from the DB up front and then you can do whatever you want with that generated application afterward.