Biggest international and domestic payment card schemes in the U.S. 2016-2021
A different report also observes the growing market share of Visa in the U.S. since the coronavirus pandemic. The main difference between the two figures, however, is the different market share for American Express as well as the mentioning of smaller brands - such as Discover, Star, and Pulse.
Visa and Mastercard were responsible for most card payments in the United States, with market shares of brands like Star and Pulse being much smaller. The two brands dominate this particular digital payment segment, and confirm an image from elsewhere: