Hooman Radfar

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Hooman Radfar
Tech Cocktial Sessions DC - June 19, 2013 - 9124785305 (cropped).jpg
Radfar, 2013
Born (1980-07-14) July 14, 1980 (age 40)
EducationUniversity of Pennsylvania (B.S.E/B.A.)
Carnegie Mellon University (M.S.)

Hooman Radfar (born July 14, 1980, London, England) is an American entrepreneur and investor. He is co-founder and CEO at Collective, an online back-office platform designed for freelancers, consultants and other businesses-of-one. He is currently a Venture Partner at Expa, a San Francisco-based start-up venture firm and studio where he was a founding partner. Previously, he was co-founder and 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] 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. from the Information Networking Institute at Carnegie Mellon University where he researched social networking.[3]



In 2004, Radfar and Austin Fath founded Clearspring Technologies to create a platform for website developers 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] then XGraph in 2011. Clearspring was rebranded as AddThis in 2012. AddThis was acquired by Oracle in 2016.


In 2014, Radfar moved to San Francisco,[7] joining Expa as an EIR.[8] He became a founding partner at the firm alongside Uber co-founder Garrett Camp and Foursquare co-founder Naveen Selvadurai in 2015. He led the seed investment program at Expa before founding Collective.


Radfar co-founded Collective with Ugur Kaner and Bugra Akcay. The company launched September 29, 2020[9] and is funded by General Catalyst Investors, QED Investors, Expa and Gradient Ventures.

Other ventures[edit]

Radfar is an active early stage investor and advisor to over 28 companies including Convoy, Onfido, Sweetgreen, SpaceX and Uber via his investment platform 10e9.

Notable Inventions[edit]

  • Method and Apparatus for Widget and Widget-Container Platform Adaptation and Distribution - Issued Mar 6, 2007 - us 20080222232[10]
  • Methods and apparatus for management of inter-widget interactions - Issued Apr 22, 2010 - us 20100100605[11]
  • Method and apparatus for widget-container hosting and generation - Issued Nov 8, 2011 - us 8056092[12]
  • Method and Apparatus for Data Processing - Issued Sep 11, 2012 - us 826627[13]


  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. ^ "AddThis founder Hooman Radfar moves west - Washington Business Journal". Washington Business Journal. Retrieved 2016-02-01.
  8. ^ Crook, Jordan. "Expa Brings On Hooman Radfar, AddThis Founder, As San Francisco EIR". TechCrunch. Retrieved 2016-02-01.
  9. ^ "Collective launches to be the ultimate 'back office' platform for freelancers". VentureBeat. 2020-09-29. Retrieved 2020-10-01.
  10. ^ [1], "Method and Apparatus for Widget and Widget-Container Platform Adaptation and Distribution", issued 2007-03-06 
  11. ^ [2], "Methods and apparatus for management of inter-widget interactions", issued 2009-09-15 
  12. ^ [3], "Method and apparatus for widget-container hosting and generation", issued 2006-09-29 
  13. ^ [4], "Method and apparatus for data processing", issued 2008-03-06 

External links[edit]