reCAPTCHA and Duolingo: Luis von Ahn

reCAPTCHA and Duolingo: Luis von Ahn

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 human. He gave away that idea for free, but years later, that same idea had evolved into a new way to monetize language learning on the web, and became Duolingo. Today, the popular app is valued at $1.5 billion, and is seeing a big spike in growth while people are confined to their homes. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

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Melissa & Doug: Melissa And Doug Bernstein (2016)

Melissa & Doug: Melissa And Doug Bernstein (2016)

Melissa and Doug Bernstein's first success was a wooden 'fuzzy puzzle' of farm animals. Today, Melissa & Doug makes over 2,000 kinds of toys and serves as an antidote to the rise of digital toys. PLUS...

5 Feb 201839min

Dell Computers: Michael Dell

Dell Computers: Michael Dell

Before it became fashionable to start a tech company in your dorm room, Michael Dell did exactly that. In 1983, he began selling upgrade kits for PC's out of his dorm at UT Austin. A few months later ...

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Serial Entrepreneur: Marcia Kilgore

Serial Entrepreneur: Marcia Kilgore

After high school, Marcia Kilgore moved to New York City with $300 in her pocket and no real plan. One step at a time, she became a successful serial entrepreneur. First, she used her high school body...

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LinkedIn: Reid Hoffman

LinkedIn: Reid Hoffman

In the early 1990s, Reid Hoffman had a vision for the future of the Internet: people would connect through social networks using their real names, and their online lives would be completely merged wit...

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Kate Spade: Kate & Andy Spade (2017)

Kate Spade: Kate & Andy Spade (2017)

We're hard at work planning our next live show, so we bring you this favorite from the last year: Kate Spade. A 1991 conversation at a Mexican restaurant led Kate & Andy Spade to ask, "What's missing ...

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Clif Bar: Gary Erickson (2018)

Clif Bar: Gary Erickson (2018)

We're taking a break for the holidays, so we bring you this favorite from the last year: Clif Bar. Gary Erickson asked his mom, "Can you make a cookie without butter, sugar or oil?" The result was an ...

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Live Episode! The Home Depot: Arthur Blank

Live Episode! The Home Depot: Arthur Blank

In 1978, Arthur Blank and his business partner Bernie Marcus were running a successful chain of hardware stores called Handy Dan – but then, they were unexpectedly fired. The next year, they conceived...

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Patagonia: Yvon Chouinard (2016)

Patagonia: Yvon Chouinard (2016)

We're taking a break for the holidays, so we bring you this favorite from the last year: Patagonia. In 1973, Yvon Chouinard started the company to make climbing gear he couldn't find elsewhere. Over d...

25 Dec 201726min

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