Type Subsidiary
Founded February 19, 2007
Headquarters New York City, United States
Founder(s) David Karp
Industry Microblogging, social networking service
Employees 413 (as of August 2016)
Parent Yahoo!
Website tumblr.com


Tumblr (stylized on its home page as tumblr.) is a microblogging and social networking website founded by David Karp in 2007, and owned by Yahoo! since 2013. The service allows users to post multimedia and other content to a short-form blog. Users can follow other users' blogs. Bloggers can also make their blogs private. For bloggers, many of the website's features are accessed from a "dashboard" interface.

As of August 1, 2016, Tumblr hosts over 307.5 million blogs. As of January 2016, the website had 555 million monthly visitors.