The payment gateway is the link between the frontend and backend of a payment. It is the interface through which the customer pays and through which the merchant collects payment. The payment processor, meanwhile, works behind the scenes to complete all of the necessary components of the transaction. Many payment gateways offer payment processing functionalities, and many payment processors also include the payment gateway. PayU’s platform integrates our own payment gateway and processing capabilities with those of partners to enable merchants to accept and optimize payments anywhere in the world through a single connection.