eBay Inc., (stylized as ebay), is an American multinational corporation and e-commerce company, providing consumer-to-consumer & business-to-consumer sales services via Internet. It is headquartered in San Jose, California, United States. eBay was founded by Pierre Omidyar in 1995, and became a notable success story of the dot-com bubble; it is a multi-billion dollar business with operations localized in over thirty countries.

The company manages eBay.com, an online auction and shopping website in which people and businesses buy and sell a broad variety of goods and services worldwide. In addition to its auction-style sales, the website has since expanded to include "Buy It Now" shopping; shopping by UPC, ISBN, or other kind of SKU (via Half.com); online classified advertisements (via Kijiji or eBay Classifieds); online event ticket trading (via StubHub); online money transfers (via PayPal) and other services.

eBay.com is not a free website, rather it charges users an invoice seller fee on the basis of if they have sold or listed any items.