What is the difference between a mastercard and visa?

Four firms control the electronic payment sector. Except for Discover, the world's merchant accounts are handled by Visa, Mastercard, and American Express. Because neither Visa nor Mastercard extends credit or issues cards, their products are distinctive. To put it another way, this implies that Visa and Mastercard credit and debit cards are provided via some kind of co-branded connection. When it comes to credit and debit alternatives, the two firms do not lend money or issue cards, but they work together to provide the widest selection of goods.