Facebook has almost caught up with Google while Twitter still lags behind Wikipedia and Blogger remains the most popular blogging platform. Tumblr blogs get as many daily page views as WordPress.com blogs but the latter attract twice as many daily visitors as the former. Self-hosted WordPress sites using WordPress.org trail far behind.
All this information is from Wolfram Alpha. I typed Google, Facebook, Twitter, Wikipedia, Blogspot, WordPress.com, WordPress.org and Twitter into the Wolfram Alpha search box and it came up with the data. The information is based on Alexa estimates, it added.