8. Business Model
● Freemium
● Certified English language tests
● Crowdsourced translation (discontinued in 2014)
9. Leadership
Luis Von Ahn
● CEO of Duolingo
● Created CAPTCHA, reCAPTCHA
● Professor at Carnegie Mellon
10. History
2009
Luis Von Ahn +
Severin Hacker
start academic
project
2013
Apple’s choice for
App of the Year
2012
Duolingo
Public Launch
2015
Partnering with
schools
2017
Duolingo Plus