The idea that would eventually become Groupon was born out of founder Andrew Mason's frustration trying to cancel a cell phone contract in 2006. Mason thought that there must be some way to leverage large number of people's collective bargaining power.Groupon is an American worldwide e-commerce marketplace connecting subscribers with local merchants by offering activities, travel, goods and services in 15 countries. Based in Chicago, Groupon was launched in November 2008, and the first market for Groupon was Chicago, followed soon thereafter by Boston, New York City and Toronto