There are a couple of alternative that I used before Stripe was allowed in my country:
- Flurly, they take 1% on top of Stripe fees but provide super easy payment setup + dashboard, fraud management. You can be paid by direct transfer or PayPal
- Paddle, never tried but has really good reputation
- Gumroad, kinda same as flurly with higher fees and custom payment pages.
You should consider alternatives before open a US company IMHO (except if you have others reasons to do so)
Gumroad (not really appro