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.DoorDash has been criticized and sued for withholding tips, reducing tip transparency, antitrust price manipulation, listing restaurants without permission, and allegedly misclassifying workers.