An organization that sells its products and services via a website on the Internet.  Also called an "e-commerce market" or "virtual market," an Internet retailer provides the website, shopping cart, return labels and related services.
For quite a while, Amazon has been the largest Internet retailer with more than 40% of the online market.  In 2024, Walmart came in a distant second.  Making up the top 10 in gross sales after Amazon and Walmart are Apple, eBay, Home Depot, Target, Costco, The Kroger Co., Best Buy and Carvana.  See 
e-commerce and 
Amazon.com.