In 2019, the ten leading e-commerce companies in the United States had a market share of 58.2 percent. In 2020, this share is projected to increase to 60.1 percent of the online retail market. All other U.S. online retail e-commerce platforms will account for the other 39.9 percent of sales.
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eMarketer. (July 8, 2020). Market share of the top 10 retail e-commerce companies versus other online retailers in the United States from 2017 to 2020 [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 28, 2026, from /statistics/1134635/leading-us-retail-ecommerce-companies-sales-share/
eMarketer. "Market share of the top 10 retail e-commerce companies versus other online retailers in the United States from 2017 to 2020." Chart. July 8, 2020. ÌÇÐÄÆƽâ°æ. Accessed July 28, 2026. /statistics/1134635/leading-us-retail-ecommerce-companies-sales-share/
eMarketer. (2020). Market share of the top 10 retail e-commerce companies versus other online retailers in the United States from 2017 to 2020. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 28, 2026. /statistics/1134635/leading-us-retail-ecommerce-companies-sales-share/
eMarketer. "Market Share of The Top 10 Retail E-commerce Companies versus Other Online Retailers in The United States from 2017 to 2020." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 8 Jul 2020, /statistics/1134635/leading-us-retail-ecommerce-companies-sales-share/
eMarketer, Market share of the top 10 retail e-commerce companies versus other online retailers in the United States from 2017 to 2020 ÌÇÐÄÆƽâ°æ, /statistics/1134635/leading-us-retail-ecommerce-companies-sales-share/ (last visited July 28, 2026)
Market share of the top 10 retail e-commerce companies versus other online retailers in the United States from 2017 to 2020 [Graph], eMarketer, July 8, 2020. [Online]. Available: /statistics/1134635/leading-us-retail-ecommerce-companies-sales-share/
