DoorDash, Inc. is a San Francisco–based company that operates an online food ordering and food delivery platform. It trades under the symbol DASH. With a 56% market share, DoorDash is the largest food delivery company in the United States. It also has a 60% market share in the convenience delivery category. As of December 31, 2020, the platform was used by 450,000 merchants, 20,000,000 consumers, and one million delivery couriers.

Food delivery is a courier service in which a restaurant, store, or independent food-delivery company delivers food to a customer. An order is typically made either by telephone, through the supplier's website or mobile app, or through a third party food ordering service. The delivered items can include entrees, sides, drinks, desserts, or grocery items and are typically delivered in boxes or bags. The delivery person will normally drive a car, but in bigger cities where homes and restaurants are closer together, they may use bikes or motorized scooters.