If you're incorporating with the purpose of eventually raising money/selling stock (which means a C corp), it's non-trivial... I assumed that's what they would

If you're incorporating with the purpose of eventually raising money/selling stock (which means a C corp), it's non-trivial... I assumed that's what they would do given that the OP was talking about raising $. But yeah, it's quick and dirty to S-corp it or LLC, depending on what state you're in. I've seen a lot of side projects (my own and others') peter out for various reasons, which is why I think front-loading it with incorporation is a bad way to spend money/time. With a good shared (WRITTEN!) understanding on vesting/disputes/etc, you can mostly de-risk it... But not in the buttoned-up way a lawyer could.