United States E-commerce Payment Market is expected to grow to US$ 1,970.01 Billion in 2028, according to Renub Research. The United States is a developed economy with the world's largest GDP. It has the second-largest online purchasing power behind China. The United States remains a world leader in E-commerce due to its historical strength in financial services, information technology, telecommunications, and transportation, as well as the vast size, diversity, and dynamism of the U.S. economy.