Stripe Atlas: The standard path
For $500, Stripe Atlas defaults to a Delaware C-Corp (or LLC), bundles Mercury banking introduction, and pre-activates a Stripe account. It is highly optimized but rigid.
Firstbase: Flexible choices
Firstbase ($399-$599) supports both LLCs and C-Corps across multiple states and offers broader banking options than Atlas. It is great for those needing more flexibility.
Doola: The non-resident specialist
Doola ($197-$297) specializes in Wyoming LLCs and provides robust ITIN assistance, making it the best choice for non-US residents without a US social security number. Note that DIY formation is cheaper but requires handling registered agents and EIN applications manually.