It certainly is the day for mergers. Two of the U.S.’s largest online food-delivery services, GrubHub and Seamless, announced on Monday that they will combine into one company. GrubHub CEO Matt Maloney will become CEO of the new joint operation, and Seamless CEO Jonathan Zabusky will be president. GrubHub, based in Chicago, has about 350 employees, while New York–based Seamless totals about 300. And the two companies are certainly moneymakers: they had a combined revenue of about $100 million in 2012. The merger will help fight off competition from newer startups, as well as cover the growing number of restaurants that want to use their services. There is no name yet for the joint venture.