Amazon.com, Inc., doing business as Amazon (, AM-ə-zon; UK also , AM-ə-zən), is an American multinational technology company engaged in e-commerce, cloud computing, online advertising, digital streaming, and artificial intelligence. It is considered one of the Big Five American technology companies, the other four being Alphabet (parent company of Google), Apple, Meta (parent company of Facebook), and Microsoft.

Amazon was founded on July 5, 1994 by Jeff Bezos in Bellevue, Washington. The company originally started as an online marketplace for books but gradually expanded its offerings to include a wide range of product categories. This diversification led to it being referred to as "The Everything Store".

The company has multiple subsidiaries, including Amazon Web Services, providing cloud computing, Zoox, a self-driving car division, Kuiper Systems, a satellite Internet provider, and Amazon Lab126, a computer hardware R&D provider. Other subsidiaries include Ring, Twitch, IMDb, and Whole Foods Market. Its acquisition of Whole Foods in August 2017 for US$13.4 billion substantially increased its market share and presence as a physical retailer. Amazon also distributes a variety of downloadable and streaming content through its Amazon Prime Video, MGM+, Amazon Music, Twitch, Audible and Wondery units. It publishes books through its publishing arm, Amazon Publishing, film and television content through Amazon MGM Studios, including the Metro-Goldwyn-Mayer studio, which was acquired in March 2022, and owns Brilliance Audio and Audible, which produce and distribute audiobooks, respectively. Amazon also produces consumer electronics—most notably, Kindle e-readers, Echo devices, Fire tablets, and Fire TVs.

Amazon has a reputation as a disruptor of industries through technological innovation and aggressive reinvestment of profits into capital expenditures. As of 2023, it is the world's largest online retailer and marketplace, smart speaker provider, cloud computing service through AWS, live-streaming service through Twitch, and Internet company as measured by revenue and market share. In 2021, it surpassed Walmart as the world's largest retailer outside of China, driven in large part by its paid subscription plan, Amazon Prime, which has close to 200 million subscribers worldwide. It is the second-largest private employer in the United States and the second-largest company in the World and in the U.S. by revenue as of 2024. As of October 2024, Amazon is the 12th-most visited website in the world and 84% of its traffic comes from the United States. Amazon is also the global leader in research and development spending, with R&D expenditure of US$73 billion in 2022.

Amazon has been criticized on various grounds, including but not limited to customer data collection practices, a toxic work culture, censorship, tax avoidance, and anti-competitive practices.