A Surprising Effect Motivated Luis von Ahn to Create Language Startup Duolingo | Fortt Knox
4:34
Life at Duolingo: An Office Tour!
16:35
Gina Gotthilf, Duolingo - How Duolingo Got to 170 Million Users for Free
21:12
TNW NYC 2016 | Luis von Ahn – Founder & CEO, Duolingo
23:35
Entrevista con Luis von Ahn - creador de Duolingo y los Captchas (en español con subtítulos)
17:07
Duolingo -- the next chapter in human computation | Luis von Ahn | TEDxCMU 2011
15:42
How I Built A $6.5 Billion App Called Duolingo | Founder Effect
10:57
Duolingo founder Luis von Ahn on education and his journey through the tech industry
25:56