In 2000, Luis von Ahn was starting his PhD in computer science when he attended a talk and happened to learn about one of Yahoo's biggest problems: automated bots were signing up for millions of free Yahoo email accounts, and generating tons of spam. Luis' idea to solve this problem became CAPTCHA, the squiggly letters we type into a website to prove we're h ... Show More
Oct 5
10 Years of How I Built This: A Decade of Innovation, Risk and Reinvention
Stories about starting a business are almost always full of drama. They’re about ambition, loss, triumph, catastrophe, resilience. And they’re also full of life lessons – which is why Guy Raz launched How I Built This 10 years ago: He wanted to host a free master class in entrepr ... Show More
1h 10m
Oct 1
Advice Line with Scott Tannen of Boll & Branch and Jamie Siminoff of Ring (2025)
CEO and co-founder of Boll & Branch, Scott Tannen joins Ring founder Jamie Siminoff and Guy on the Advice Line to answer questions from three early-stage entrepreneurs. Plus, Jamie and Guy talk about how creating repeat customers often comes from creating social good. First, we h ... Show More
46m 9s
Nov 2024
Why Duolingo Worked (with Luis von Ahn, CEO)
Duolingo has fundamentally changed the landscape of self-guided education, starting with language learning. It is now a $9B publicly traded company in a space where everyone thought you could never build a large and exciting company. We’re joined by Duolingo founder and CEO, Luis ... Show More
1h 1m
Aug 2025
S8E8: Luis von Ahn Is Making Screen Time Count
<p>Luis von Ahn was a tenured professor of computer science at Carnegie Mellon University who had sold a company to Google. “You were pretty set, a lot of us would say, so why were you so hungry to build something new with Duolingo?” asks Ayesha Karnik, MBA ’25. </p><p>“For ... Show More
57m 51s
May 2020
A masterclass in crowdsourcing, w/Duolingo's Luis von Ahn
Crowdsourcing is more than a group of people interested in the same cause, it’s a way to tap skills – and scale – that you don’t have. And when it works, it can be the rocket fuel that launches you to scale further than you could have ever imagined. No one knows this better than ... Show More
39m 13s
Oct 2021
A masterclass in crowdsourcing, w/Duolingo's Luis von Ahn
Crowdsourcing is more than a group of people interested in the same cause, it’s a way to tap skills – and scale – that you don’t have. And when it works, it can be the rocket fuel that launches you to scale further than you could have ever imagined. No one knows this better than ... Show More
39m 13s