In my previous uk startup for an online game (100 mill players) we used multiple providers. Vindicia, Playspan and Paypal as well as physical shop based game ti

In my previous uk startup for an online game (100 mill players) we used multiple providers. Vindicia, Playspan and Paypal as well as physical shop based game time cards. And then also later directly with Apple's appstore and Google's Play store. You might find yourself requiring multiple providers for different requirements and redundancy. Playspan was for example very good at the south american market, Vindicia very good at retrying failed payments and auto replacing card details for recurring subscriptions. And a lot of customers expected to be able to pay with Paypal whom are also good at fraud prevention. But to echo everyone here, if my "next" startup requires a payments provider I would initially go with Stripe and/or Braintree.