Total ecommerce sales in the United States of America exceeded $1 trillion in 2022, after an 8.5% increase from the previous year. 

If you’re considering starting an online business there, you need to better understand the market, starting with locating the biggest sources of online sales. In other words, you need to know what the top ecommerce companies in the USA are. Here’s a breakdown of the largest ecommerce companies in the USA, ranked by their market shares.

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Largest ecommerce companies in the USA

A recent analysis by industry experts shows that Amazon currently leads the list of the top ecommerce companies in the USA—and by a substantial margin. In 2023, its market share is 37.6%, which means more than one-third of all online sales come through Amazon. Amazon also currently ranks second among the largest retailers in the USA in terms of total retail sales, after Walmart.

Amazon holds a tremendous lead over second-placed Walmart, which has a market share of 6.4%. This is followed by Apple, with 3.6%. Together, these three largest online retailers in the USA have a combined market share of 47.6%, which is to say that nearly half of all digital retail sales generated in the USA are from these three companies.

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The analysis also shows that Amazon is expected to maintain its top spot in 2024, even growing its market share by 0.4 percentage points, to 38%. This is while Walmart and Apple’s market shares hold steady.

eBay, the most popular online marketplace, is fourth on this list ranking the top ecommerce companies in the USA. It has a market share of 3%. Completing the top six are Target and The Home Depot, with market shares of 1.9% each.

Costco is in seventh place, with a market share of 1.5%. Best Buy and Carvana follow. Both have market shares of 1.4%. Carvana also currently tops the ranking of the fastest-growing ecommerce companies in the USA. Its annual sales are expected to rise by 14.5% in 2023. 

Ohio-based Kroger and Chewy, a retailer offering pet-related products, round out the 10 biggest online retailers in the USA, with market shares of 1.3% and 1%, respectively.

Together, the market shares of these top ecommerce companies in the USA add up to 61%. 

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