Stripe's superior fraud detection is an open secret in FinTech. There are apparently a lot of large companies with their own payment rails that route riskier looking payments (e.g. a new account who you haven't yet settled a transaction with) through Stripe for this reason.
If there is one company besides Stripe that I'd expect to have high quality fraud detection, I'd name Amazon actually, maybe add PayPal. The largest online retailer in all major markets sans China and Russia by far, you don't get to that position if you're lacking in the anti-fraud department.
(Alternatively, one might say Amazon simply is large enough to eat up the cost of fraud...)