My hot take: if a founder can't spin up a simple, self-hosted webform of some sort, I'm already wary of their technical skills.
I’d be wary of a founder with such bad NIH
It would be like writing your own email servers or calendar software. It would be a distraction at best.
Write a form in .md (even tell an llm to do it) and just put it online.
Web forms are simple like that slack notification thing is simple.