The term VISA RIVAL refers to two of the most popular credit card companies in the world, American Express (AMEX) and Mastercard. Both companies offer a variety of services and products to their customers, including rewards programs, cash back, and travel benefits. AMEX is known for its high-end customer service and exclusive offers, while Mastercard is known for its wide acceptance and global reach. Both companies are fierce competitors in the credit card industry, offering competitive rates and features to attract customers.