Hooman Radfar

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Hooman Radfar
Born (1980-07-14) July 14, 1980 (age 37)
London, England
Residence San Francisco, California, U.S.
Education University of Pennsylvania (B.S.E/B.A.)
Carnegie Mellon University (M.S.)
Occupation Entrepreneur

Hooman Radfar (born July 14, 1980, London, England) is an American entrepreneur and investor. He is a partner at Expa, a San Francisco-based start-up studio. Previously he was co-founder and served as CEO of AddThis. AddThis provides the most widely used marketing tools for web site creators. According to web measurement firm ComScore, in 2015 the platform was ranked #1 in AdFocus, reaching over 97% of users in the United States ahead of Google, Yahoo and Facebook.[1] The platform reaches 2.1 billion users world-wide monthly. According to TechCrunch, AddThis was purchased by Oracle in 2016 for around $200 million.[2]

Early life and education[edit]

At the time of the Iranian Revolution, his family immigrated to England in 1979. Radfar was born in London in 1980. His family later moved to the United States where he was raised in Pittsburgh, Pennsylvania. Radfar graduated from Upper St. Clair High School in 1998. In 2002, he graduated magna cum laude from the University of Pennsylvania with degrees in Computer Science and Economics. In 2004, he earned his M.S. in Information Networking from the Information Networking Institute at Carnegie Mellon University where he researched social networking.[3]


AddThis (Clearspring)[edit]

In 2004, Radfar and Austin Fath founded Clearspring Technologies to create developer platforms based on their graduate research in web services and social networking at Carnegie Mellon.[4] Clearspring launched the first content sharing and tracking service for web publishers in 2006.[5] The company acquired AddThis in 2008[6] and XGraph in 2011.[7] Renamed AddThis in 2012,[8] the company provides the largest personalization platform on the web to a network of 15M publishers.[9]


In 2013 Radfar founded 10e9[10] an early stage investment and advisory company. As director of 10e9, he has worked with companies like Convoy, Uber, Hyperloop, Hinge, Washio,[11] Sweetgreen.[12] and more.


In 2014, Hooman moved to San Francisco,[13] joining Expa[14] as an EIR.[15] He became a partner at the firm alongside Uber co-founder Garrett Camp and Foursquare co-founder Naveen Selvadurai in 2015.

Awards & recognition[edit]

He was named one of Tech's Best Entrepreneurs by BusinessWeek alongside Twitter co-founder Jack Dorsey.[16] He is also a Top 25 Marketing Leader and Innovator Online according to iMedia Publications.[17] He was a commencement speaker at Carnegie Mellon's Information Networking Institute [18] and a Whiting Turner Lecturer at the University of Maryland.[19]


  1. ^ "comScore Ranks the Top 50 U.S. Digital Media Properties for January 2015". comScore, Inc. Retrieved 2016-02-01. 
  2. ^ Lunden, Ingrid. "Oracle Buys Audience Tracking Firm AddThis For Around $200M". TechCrunch. Retrieved 2016-02-01. 
  3. ^ "LinkedIn Public Profile". 
  4. ^ Shropshire, Corilyn (June 6, 2007). "Clearspring's 'widget' deal may help boost NBC". Pittsburgh Post Gazette. Retrieved December 14, 2013. 
  5. ^ Cashmore, Pete (November 6, 2006). "Clearspring to Track Widgets Across Netvibes, Myspace, and More". Mashable. Retrieved December 14, 2013. 
  6. ^ Lardinois, Frederic (September 30, 2008). "Widget Platform Clearspring Acquires AddThis". ReadWrite. Retrieved December 14, 2013. 
  7. ^ Swisher, Kara (November 1, 2011). "Clearspring Buys Data Science Start-Up XGraph". AllThingsD. Retrieved December 14, 2013. 
  8. ^ Shontell, Alyson (May 10, 2012). "Social Data Company Clearspring Changes Its Name To AddThis And Now Reaches 1.3 Billion Monthly Uniques". BusinessInsider. Retrieved December 14, 2013. 
  9. ^ "AddThis is the largest social infrastructure and data platform". Company About page. AddThis. Retrieved December 14, 2013. 
  10. ^ 10e9
  11. ^ "Angel.co - Investors". Angel.co. March 8, 2013. Retrieved December 14, 2013. 
  12. ^ "Angel.co - Investors". Angel.co. December 3, 2013. Retrieved December 14, 2013. 
  13. ^ "AddThis founder Hooman Radfar moves west - Washington Business Journal". Washington Business Journal. Retrieved 2016-02-01. 
  14. ^ Expa
  15. ^ Crook, Jordan. "Expa Brings On Hooman Radfar, AddThis Founder, As San Francisco EIR". TechCrunch. Retrieved 2016-02-01. 
  16. ^ "Tech's Best Entrepreneurs". BusinessWeek. March 26, 2007. Retrieved December 14, 2013. 
  17. ^ "iMedia 25 - 2009 Internet Marketing Leaders and Innovators". iMedia. 2009. Archived from the original on January 6, 2014. Retrieved December 14, 2013. 
  18. ^ "Entrepreneur to Speak at INI Diploma Ceremony". Carnegie Mellon University - Information Networking Institute. March 1, 2011. Retrieved December 14, 2013. 
  19. ^ "The Business of Social Media - A Whiting-Turner Lecture". News and Events - A. James Clark School of Engineering. April 2, 2009. Retrieved December 14, 2013. 

External links[edit]