Top Sites

As a data-driven company, we've become well-known for our Top Ranked Sites list, which by default, ranks top U.S. websites by monthly visitors. Switch countries to get a different perspective.

For sites that use Quantcast Measure, you can click through for an in-depth view of their audience data and insights.

Data Insights

Audience data drives our storytelling as well. The posts below demonstrate what you can learn when you take a closer look at your audience.

Harness the real-time pulse of the open Internet

Since 2006, we’ve been building Q - the world’s largest AI-driven audience behavior platform for the open Internet that today directly quantifies over 100 million mobile and web destinations. Comprised of Internet-scale 1st party data, self-adapting predictive models and integrated AI optimisation, Q’s collection of machine learning technologies continually interprets the consumer behaviour graph giving brands a real-time pulse of the Internet.


million web destinations use Quantcast


number of times we see the average Internet user each month

Look Up Public Audience Data

Explore Recently Quantified Sites

10 70,313,504
13 56,426,004
18 42,644,684
24 32,424,136
25 31,588,318