Quantcast is an American technology company, found

Quantcast is an American technology company, founded in 2006, that specializes in audience measurement and real-time advertising.[4] The company offers public access to traffic and demographic data for millions of web sites and detailed user insights to digital publishers.[5] In 2013, the company claimed that it produced accurate audience measurement to over 100 million web destinations.[6] The company is headquartered in San Francisco. It has offices in the United States, Canada, Australia, Singapore, United Kingdom, Ireland, France, Germany, Italy, and Sweden.[7][8]