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Justin Yoshimura

Justin Yoshimura is an entrepreneur and angel investor. He is currently the founder and CEO of 500friends, a provider of SaaS loyalty marketing solutions backed by $12M+ from Crosslink Capital, Intel Capital, Silicon Valley Bank, and YCombinator. Prior to 500friends, he dropped out of high school to found two e-commerce companies, both of which were acquired. He is also an investor in Zencoder, ifeelgoods, Hipmunk, Homejoy, OwnLocal, Torbit, Userfox, Firebase, and First Opinion. Besides entrepreneurship, Justin is passionate about animals, especially dogs, persian/exotic cats, dolphins, and sea turtles. He was recently named to Forbes’ prestigious 30 under 30 list.

Recent Milestones


Company Date Round Size Participants
500Friends 3/2012Series A$4.5M4
BoostCTR 3/2011Seed$1.64M8
OwnLocal 6/2010Seed$1M18
GazeHawk 6/2010Seed4
Zencoder 2/2010Seed3
500Friends 12/2009Seed$1.4M15



  1. 500Friends Raises $4.5M Series A For Its Social Loyalty Platform ( [edit]
  2. The Demand Media of Search Engine Marketing, BoostCTR, Raises $1.6 Million ( [edit]
  3. YComb's Seeing Interactive Raises Seed Round From Baseline, Buchheit, Schachter, and Lerer Ventures ( [edit]
  4. TechCrunch ( [edit]
  5. Startups And Top Investors Unite At Y Combinator's Tenth Demo Day ( [edit]
  6. Startups And Top Investors Unite At Y Combinator's Tenth Demo Day ( [edit]
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Last Edited 1/7/14

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