Quantcast is a great site for getting up-to-date stats for traffic, demographics and lifestyle information on the web users audience for any website that has enough traffic to warrant measurement.
The growth of Twitter has been phenomonal this year. Quantcast states that Twitter.com is a top 50 site (current rank 24) that reaches an estimated 28 million U.S. people monthly. That’s projected up from about 7 million in February 2009, nearly 400% increase.
While the rate of growth is staggering for Twitter, Facebook still has the motherload of eyeballs. Quantcast lists Facebook.com as a top 10 site (current rank 3) that reaches an estimated 94 million U.S. people monthly . That’s up from about 54 million in February, nearly doubling the readership in just the last 6 months alone.
LinkedIn.com has quantified their numbers with Quantcast so rather than estimated, these numbers are being pulled directly from their site. LinkedIn.com ranks in the top 100 sites (currently ranked 63) and connects marketers with over 40 million more affluent professionals. Over 11 million U.S. people visit monthly and over 21 million globally. Unlike Twitter and Facebook, LinkedIn’s growth remains rather flat but demographics are higher in terms of college grads and income, and skews a bit more male than Twitter and Facebook.
