Quantcast Measurement automatically provides free, directly measured traffic and audience composition reports. This includes MRC accredited data which ensures that your reports are accurate and reliable. View the attributes and demographic composition of your audiences and understand what makes them unique. Easily build and view reports for your domains, sub-domains and networks.

The Quantcast asynchronous tag provides superior page loading performance. It minimizes the number of direct calls, improves latency and ensures proper measurement. It has zero impact on load time.

Use Quantcast audience segments to group your audiences anyway you like. Use these segments to showcase your audiences to prospective advertisers. This segments feature is unique to Quantcast. Learn about Quantcast Audience.

Unlike traditional panel-based measurement, Quantcast directly measures audiences to provide greater accuracy. Additionally, Quantcast tells you the difference between cookies and people. A single person can be represented by many cookies–home, work, phone, even different browsers.

You determine who has access to your audience reports. Share this information with the world to attract advertisers or keep it private.

ABC, Fox, MTV, NBC, LinkedIn, CNNMoney, Huffington Post, Pandora, Time Inc., People, WordPress, Tumblr, Gawker, Perezhilton.com, the Washington Post... the list goes on and on. More than 10 million web destinations directly measure their properties with Quantcast.

Ten of the top ten agencies use Quantcast. OMD, Initiative, Carat, Mindshare, Starcom and many, many more. This means that many of the top marketers are buying against Quantcast publishers.

Sign up for free account and follow our instructions for tagging your site. Your traffic charts usually populate in 4 - 6 days after you scan your site, depending on the reach of your site. Other reports like Demographics, Lifestyle, Traffic, Business and Geographic populate in a few weeks. Learn more about our reports.