The difference is the way it took to get where they are, technically speaking. On one side, they chose to architecture their SDKs/APIs in a way for some reasons

The difference is the way it took to get where they are, technically speaking. On one side, they chose to architecture their SDKs/APIs in a way for some reasons, after some thinking. And they are going to keep improving on it in a consistent way. Same thing for customer support. On the other side: "Hey, it works for them, let's not think, throw $10M and do the same!", but I don't think it's possible to improve the product when you just rely on the innovation on someone else. Until now, the only valid reason that made people chose Paymill was that they were available in Europe, but Stripe is going to change that soon. One other good example to show how good rocket internet is: Here is a french website: http://www.adopteunmec.com/ http://www.adopteunmec.com/ (you can translate it by "adoptaguy.com") And here come RI in Germany: http://www.shopaman.de/ http://www.shopaman.de/, looks familiar?