Luis von Ahn, PhD
About
known as one of the pioneers of crowdsourcing. He is the founder of the company reCAPTCHA, which was sold to Google in 2009.
Hosted AMAs
2186
IAmA scientist and startup CEO named Luis von Ahn. I developed CAPTCHA and reCAPTCHA, those squiggly characters you see all over the web (sorry!). I'm now working on Duolingo, a new way to learn languages while helping to translate the Web. AMA.
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3179
IAmA scientist and entrepreneur named Luis von Ahn. I’m the CEO/co-founder of Duolingo, a totally free way to learn languages. I won’t rest until people stop paying for crappy language learning software. I also developed CAPTCHA and reCAPTCHA, tho...
Comments: 1499 • Responses: 58 • Date:
855
I am Luis von Ahn, the creator of reCAPTCHA, those squiggly characters all over the web, and the co-founder and CEO of DUOLINGO! Duolingo has become the most popular way to learn languages online, for free, and has overtaken expensive and gimmicky...
Comments: 447 • Responses: 64 • Date:
643
I am Luis von Ahn, co-inventor of CAPTCHA & reCAPTCHA, Founder/CEO of Duolingo, MacArthur Fellow and computer science professor. AMA!
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Highest Rated Comments
vonahn605 karma
Because they don't motivate you to keep going! We spend a lot of effort making Duolingo addictive -- we think the hardest part about learning anything on your own is motivation.
vonahn1913 karma
http://imgur.com/5JYah
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