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Yeah, I'm developing a new product at the moment - I surveyed a bunch of end-users and a LOT of them had PayPal accounts - so Braintree's PayPal integration is a compelling feature to me. That said, here in Europe, Stripe's fees are better than Braintree's, and PayPal's Eurozone fees are quite eye-watering.

[plug]

That said, I'm Irish and therefore totally biased toward Stripe for that reason alone. As if their stellar tooling and the friendly, truly excellent customer and tech support I've experienced from them so far isn't enough :)