Amazon.com is leading the U.S. e-commerce market, with e-commerce net sales of US$125,844 million in 2021 generated in the U.S., followed by walmart.com with US$46,446 million. Third place is taken by apple.com with revenues of US$25,862 million. Target.com is the fourth biggest online store in the U.S. with net sales of US$19,771 million in 2021.

As of June 2022, Amazon accounted for 37.8 percent of the U.S. e-commerce market, making it the country’s leading online retailer by a considerable margin. Second place was occupied by the e-commerce site of the retail chain Walmart, with a 6.3 percent market share, followed in third place by Apple, with 3.9 percent.

According to forecasts, online sales through Jeff Bezos' platform were set to reach more than 386 billion dollars in 2021. Coming in a distant second is retail chain Walmart, with sales expected to surpass 67 billion dollars, and followed in third place by e-commerce company eBay, with sales of about 40.5 billion dollars.