Tumblr is the 6th most popular social network in the world at 110,000,000 estimated unique monthly visitors. It was founded in February 2007 and its headquarters is in New York City. The concept of Tumblr is a dashboard interface where users can post multimedia and other content in form of a short blog.

As of December 1, 2014, Tumblr hosts over 213 million blogs.

In 2011, Tumblr became the first blogging platform to host President Obama's blog.