In this article, we have listed the top 20 e-commerce companies in the world. To gather a list of the top e-commerce companies in the world, we went over several sources including industry reports, our rankings, and multiple similar rankings. We also scanned the Finviz and Yahoo Finance stock screeners. For public companies, we checked each company's market capitalization as of February 27, 2024, on Yahoo Finance. The market caps for foreign companies were converted to US dollars based on the exchange rates of the respective country. To quantify the "value" or "size" of private companies, we selected either the estimated valuation, the annual revenue available for the most recent fiscal year, or the number of employees, subject to availability. The top 20 e-commerce companies in the world are ranked below in ascending order of their market cap, for public companies, or alternative metrics, for private companies.