> I am also not sure who Stripe Atlas for.

It's for founders who don't have lawyers. My co-founder and I are both developers, we used Stripe Atlas to incorporate a C-Corp due to expecting to fundraise <1 year after incorporation. Stripe Atlas generates about 200 pages of legal boilerplate documents with very sane defaults so that your corporate structure, bylaws, IP protections, director indemnity, etc. align well with investor expectations. It helps investors not have to "rules-lawyer" all your corporate records during due-diligence, because their content exactly matches YC's expectations.

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I said we made a C-Corp but other founders should default to LLC, which Stripe Atlas can also streamline. An LLC is superior to C-Corp in pretty much every way for any pre-raise founders who don't have an extra $2,000 to >$10,000/year they're willing to part with for higher franchise taxes, "foreign" (different state) corporation registration, CPA's, and additionally lawyers if any investments aren't YC SAFE's (e.g. not YC, Neo, or A16Z SpeedRun).

Also note that for pre-revenue C-Corps, Delaware franchise taxes are scaled against number of shares, not company revenue or # of employees, so you can save some money by forming your company with 1,000,000 shares and then file a "Unanimous action of the board of directors" to increase it to 10,000,000 just before angel/pre-seed/seed round, and potentially save a few hundred dollars on your first year franchise taxes, depending on when you incorporate and raise. But if a few hundred dollars makes a difference to you, incorporating as an LLC instead of a C-Corp is the only defensible decision.

And as always, start your taxes 3-4 months before they're due. If you want a CPA to do them (which you should if you have any revenue), you'll need to retain them way ahead of time for C-Corps. If you're filling tax forms out yourself, you'll want to start at least a month before they're due.