Earlier quoted context omitted.
I just listened to a podcast with Patrick Collison in which he listed the ways in which Stripe's market seemed unattractive when they started out. Dauntingly complex, highly regulated etc. Anyone looking to compete with Stripe will have the same thought process and probably won't bother. And if they do then they will have to execute as successfully as Stripe over an extended period. Edit: Just to add that the podcast…
sure that was then, but that changed over the years. stripe is not cheap, i'm pretty sure if somebody came with the same UX many would switch, us including. We are B2B and with postpaid so the customers are using Stripe to pay Invoices. There are zero charge backs or fraud but still have to pay high fees.
Sure you'd like an identical service to Stripe for a lower fee but the moat is that doing what Stripe does isn't easy at all. You're paying for that fact.