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General Information


Stanford University

Current Companies

Board of Directors

Former Companies


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Web Presences


Sam Altman

Sam Altman is president of Y Combinator and was the cofounder of Loopt, a location-based social networking app, which was part of YC’s first batch in 2005 and acquired by Green Dot in 2012.

Prior to taking over as Y Combinator’s president, Sam was a part-time partner at Y Combinator since 2011. You can read Sam’s essays on startups and technology at his blog.

Sam has consistently been recognized for his entrepreneurship. He was featured in Inc. Magazine’s Top 30 Entrepreneurs Under 30 and BusinessWeek’s Tech’s Best Entrepreneurs.

As an early innovator in mobile location services, Sam joined Apple CEO Steve Jobs on stage at WWDC 2008, presenting Loopt as one of the first applications in the iPhone App Store.

Sam has been a valuable source for many media outlets including Charlie Rose, CNN, The Economist, New York Times, Wall Street Journal and numerous others.

Recent Milestones


Company Date Round Size Participants
Clever 3/2014Series A$10.3M4
Vicarious 3/2014Series B$40M17
WeVorce 11/2013Seed$1.7M2
Lob 11/2013Seed$2.4M9
URX 10/2013Seed$3.1M32
LE TOTE 8/2013Seed$1.75M14
Heap 8/2013Seed$2M14
Swiftype 8/2013Seed$1.7M15
Quartzy 7/2013Series A$4M6
CrowdMed 6/2013Seed$1.2M8
Virool 2/2013Seed$6.62M22
BufferBox 8/2012Seed$1M8
PlanGrid 5/2012Seed$1.1M9
Exec 5/2012Seed$3.3M14
Priceonomics 5/2012Seed$1.5M28
Couple 5/2012Seed$4.2M13
Custora 1/2012Seed10
Eponym 2012Seed$1M5
Science Exchange 12/2011Seed$1.5M6
MemSQL 7/2011Seed$5M15
Optimizely 3/2010Angel$1.2M21
CarWoo! 1/2010Seed$300k13



    Citation Needed [add]
  1. In 18K Schools And Counting, Clever Confirms $10.3M Raise From Sequoia, As It Looks To Build The Next Big Learning Platform ( [edit]
  2. Vicarious Grabs A Huge, New $40M Growth Round To Advance Artificial Intelligence ( [edit]
  3. Wevorce Gets $1.7 Million To Use Technology To Make Divorce Less Messy ( [edit]
  4. Cloud Printing & Shipping Service Lob Raises $2.4 Million Seed Round ( [edit]
  5. URX Is A Brilliant Mobile Ad Service That Deeplinks Customers Right To Ecommerce App Product Pages ( [edit]
  6. Techcrunch ( [edit]
  7. Heap Raises $2M For Their “Capture Everything” Analytics Tool ( [edit]
  8. Site Search Engine Creator Swiftype Raises $1.7M From A16Z, Others ( [edit]
  9. Quartzy Raises $4M In Series A Financing ( [edit]
  10. Citation Needed [add]
  11. YC-Backed Virool Raises $6.62 Million “Seed” Round To Help Make Videos Go Viral ( [edit]
  12. Citation Needed [add]
  13. YC Alum/Construction Disruptor PlanGrid Nails $1.1M Seed Funding From Box, 500 Startups, And More ( [edit]
  14. Exec, The Mobile App For Errands, Adds Messaging (Oh, And Sam Altman Led Their Round) ( [edit]
  15. YC Price Guide Startup Priceonomics Raises $1.5M Seed From Andreessen Horowitz, SV Angel ( [edit]
  16. Yuri Milner, Dave Morin, SV Angel, CrunchFund And More Hook Up Pair With $4.2M ( [edit]
  17. SV Angel, Founder Collective And Others Put $850K In Customer Retention SaaS Custora ( [edit]
  18. Warby-As-A-Service? Backed By Reddit, Posterous Founders, Eponym Helps Brands Build And Distribute Their Own Eyewear ( [edit]
  19. Science Exchange’s Marketplace For Research Facilities Gets A $1.5 Million Boost ( [edit]
  20. Y Combinator Alum MemSQL Raises $2.1 Million From Ashton Kutcher, SV Angel And More ( [edit]
  21. Optimizely A/B Tests Its Way To $1.2 Million In Funding From A Roster Of Top Angels ( [edit]
  22. Citation Needed [add]
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Last Edited 3/25/14

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