The term 'Mastercard Alternative' refers to three different payment methods: AMEX (American Express), VISA, and AmericanExpress. AMEX is a credit card company that offers a variety of services, including travel rewards, cash back, and more. VISA is a global payments technology company that enables digital payments across the world. AmericanExpress is a financial services corporation that provides credit cards, charge cards, and other financial products. All three of these payment methods are accepted by most merchants and provide customers with an alternative to Mastercard.