Company · Software · Technology · founded 2011
Duolingo
Educational technology company founded by Luis von Ahn and Severin Hacker that makes language-learning apps and language certification. Private beta launched in November 2011; it trades on Nasdaq as DUOL.
Of the 1 person here linked to Duolingo, 1 is a founder and 1 is still there. These are people who succeeded, not the odds of succeeding.
Description and founding year: en.wikipedia.org. Each person's role links to its own source on their profile.