Can anyone tell me what the American equivalent of Afterpay is?

I am in the middle of creating an ecommerce site and, and though my niche should do well locally (Australia), I believe the bigger market is definitely in America. Before I set up my website, I want to make sure I use a host that is capable of integrating with both Australia's and America's most common payment methods. Afterpay has become very popular here in Australia – an interest free payment method for consumers (they pay in 4 installments, only pay extra if they're late). What is the American equivalent of this payment method?