A Fortune 1000 company that offers debit, credit and prepaid services as well as mobile commerce, payroll, check processing and more, Heartland Payment Systems was founded in 1997 and is based in Princeton, New Jersey with offices around the U.S. It handles more than 250,000 locations in the U.S. and more than 11 million transactions per day. It focuses on mid-sized and small businesses and has been a public company since 2005.