David Karp (born July 6, 1986) is an American entrepreneur and blogger, best known as the founder and former CEO of the microblogging platform Tumblr. Karp began his career, without receiving a hig
h school diploma, as an intern under Fred Seibert at the animation company Frederator Studios, where he built the studio's first blogging platform and conceived, wrote, and edited their first internet video network, Channel Frederator. Karp went on to work for the online parenting forum UrbanBaby until it was sold to CNET in 2006. Karp then started his own software consulting company, Davidville, where he worked with software engineer Marco Arment on projects for clients. During a gap between co
