Instant bank transfer and giropay are account-based online payment methods where customers initiate an online transfer directly at the checkout. With giropay, customers are redirected to their bank and pay there as usual with their online banking data. Sofortüberweisung is a service of the payment service provider Klarna. Account holders have to enter their login data on the company's website, which can deter security-conscious customers. On the other hand, Sofort works independently of the bank account, while giropay only works for customers of cooperating banks and savings banks.