Which startup was founded by Tony Xu?

Tony Xu founded DoorDash.

Xu co-founded DoorDash in 2013 with Stanford classmates Andy Fang, Stanley Tang, and Evan Moore. Before DoorDash formally launched, the group operated a predecessor service called PaloAltoDelivery.com in 2012. The founders began by helping local restaurants reach customers who wanted delivery but lacked their own drivers.

Xu’s family experience influenced the business: his mother worked in a restaurant after the family immigrated to the United States from China. In DoorDash’s early period, Xu and the other founders personally completed deliveries, giving them direct insight into restaurant, customer, and courier problems. The company later grew into a major online ordering and delivery marketplace.

DoorDash went public in December 2020. Xu continued as chief executive and became the company’s chairman. Postmates, Grubhub, and Uber Eats are all recognizable delivery services, but they were founded by different teams. Since the question asks which startup Tony Xu founded, DoorDash is the clear canonical answer, even though he had three co-founders.