“Democratize the Future”

John S. Kim (김동신, 金東信) is the Co-Founder and CEO of SendBird, the chat API for mobile apps and websites. (Y Combinator W16, Techstars S14). We’ve raised over $120M USD to-date and power tens of millions of users a month across our platform.

This blog is an open-letter to my family and friends, with somewhat of an audacious goal to pass down some of my personal learnings and life’s frameworks. My desire is to convey consistency in my thought process to the readers, yet, show vulnerability, shortcomings, with continued growth and positive changes uncovered over time. No one started perfect and no one will end perfectly. I would like be forever learning and growing.

Previously, I was the founder and CEO of Paprika Lab, a social gaming company, which he founded in 2007, grew to 30 people, and got acquired by GREE, a Japanese public company in 2012.

My focus is on technological products, building teams, and business development. I’ve studied and hold B.S. in Computer Science and Engineering from Seoul National University. I happen to be Korea’s all-time no.1 Unreal Tournament pro gamer.


  • DISC: DC
  • Strengths Finder: Achiever, Competition, Activator, Futuristic, Focus

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