Restaurant takeout. Seamless and GrubHub, which merged in 2013, are essentially mobile platforms that connect consumers with local restaurants for takeout delivery. Restaurants pay the services a commission. Unlike smaller competitor DoorDash, GrubHub does not have its own fleet of delivery vehicles, but that may be changing soon. In response to big competitors such as Uber and Amazon, who also have designs on the food delivery market and have the logistical manpower to be far more agile than most restaurants, GrubHub is rolling out its own fleet in a few test markets.