VoiceStar, Inc. offers call tracking and pay per phone call technologies that provide real-time data on advertising effectiveness. The companyâ€™s platform, through a private-labeled Web portal, gives access to statistics, such as the number of calls and the advertisements that sourced the clients. The platform also enables advertising agencies, directories and publishers, SEO and SEM shops, lead generation firms, Internet sites, and direct marketers to track the success of advertising and demonstrate return on investment to clients; connect sellers and buyers in real time; provide accountability; and take marketing decisions. The company was founded in 1999 and is headquartered in Philadelphia, Pennsylvania. As of September 19, 2007, VoiceStar, Inc. is a subsidiary of Marchex, Inc.
1315 Walnut Street
Philadelphia, PA 19107