DoorDash Inc. is an American on-demand prepared food delivery service. founded by Stanford students Tony Xu, Stanley Tang, Andy Fang and Evan Moore. It is one of several technology companies. It uses logistics services to offer food deliveries from restaurants on-demand. DoorDash launched in Palo Alto and, as of May 2019, had expanded to more than 4,000 cities and offers a selection of 340,000 stores across the United States, Canada and Australia. 