Visa is Mastercard's biggest rival. Visa was founded in 1958, and is headquartered in Foster City, California. Like Mastercard, Visa also works within the Professional Services sector. Visa generates $8.6B more revenue vs. Mastercard.
American Express is one of Mastercard's top competitors. American Express's headquarters is in New York, New York, and was founded in 1850. Like Mastercard, American Express also works within the Professional Services sector. American Express generates 234% of Mastercard's revenue.