Amazon.com, Inc., doing business as Amazon, is an American multinational technology company engaged in e-commerce, cloud computing, online advertising, digital streaming, and artificial intelligence. Founded in 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, referred to as "The Everything Store".

Walmart Inc. is an American multinational retail corporation that operates a chain of hypermarkets (also called supercenters), discount department stores, and grocery stores in the United States and 23 other countries. It is headquartered in Bentonville, Arkansas.The company was founded in 1962 by brothers Sam and James "Bud" Walton in nearby Rogers, Arkansas. It also owns and operates Sam's Club retail warehouses.

Aldi is the common company brand name of two German multinational family-owned discount supermarket chains operating over 12,000 stores in 18 countries. The chain was founded by brothers Karl and Theo Albrecht in 1946, when they took over their mother's store in Essen. The business was split into two separate groups in 1960, that later became Aldi Nord (initially Northern West Germany), headquartered in Essen, and Aldi Süd (initially Southern West Germany), headquartered in neighbouring Mülheim.