Save money on payment fees. Now in-store. It's never been more important to run your store cost-effectively. Payment.Ninja saves you money on payments, without compromising on the types of cards you can accept. Accept all major card brands Accept Visa, Mastercard, American Express and Discover debit and credit cards, domestic and international. Highest security standards Our technology complies with all the latest cyber-security standards and the industry-wide PCI DSS requirements. Helps your business grow From clean and efficient payment forms to data insights, Payment.Ninja supports your growth all the way.