Founded in 1999 and headquartered in Reston, Virginia, comScore (NASDAQ: SCOR) is a global media measurement and analytics company that makes audiences and advertising more valuable. comScore helps media buyers and sellers understand and make decisions based on how consumers use different media, such as TV, video, mobile, desktop and more. Through its products and partnerships, comScore helps its more than 2,500 clients understand their audiences, know if their advertising is working, and access data where they want and need it.