Amazon Go is a chain of convenience stores in the United States, operated by the online retailer Amazon. The stores are partially automated, with customers able to purchase products without being checked out by a cashier or using a self-checkout station. As of 2020, there are 27 open and announced store locations in Seattle, Chicago, San Francisco and New York City. ,Amazon Go stores were conceptualized and tested by a team of Amazon executives, who constructed a 15,000-square-foot mock supermarket in a rented warehouse in Seattle, before revealing the work to Amazon founder Jeff Bezos in 2015. The first store, located in the company's Day 1 building, opened to employees on December 5, 2016, and to the public on January 22, 2018. The flagship store sells products such as prepared foods, meal kits, limited groceries and liquor. A larger variant, Amazon Go Grocery, opened in Seattle's Capitol Hill neighborhood on February 25, 2020. The following month Amazon began to offer its technology to other retailers so that their customers could make purchases without the involvement of cashiers or Amazon accounts.