Worldpay is one of the world’s largest payment service providers, processing $2.3 trillion worth of commerce in 2023, for over a million merchants globally.The firm will now switch from offering Klarna as an alternative payment option, added on the request of a retailer, to a default method alongside traditional cards.David Sykes, chief commercial officer, Klarna, says: "We want Klarna at every checkout, available everywhere, for everything, all the time. "This expanded partnership is a massive leap towards that goal, making Klarna the default payment method for hundreds of thousands of retailers."