How I Built A $6.5 Billion App Called Duolingo | Founder Effect

By the time Luis von Ahn turned 24, he was already a millionaire several times over.

The 43-year-old may not be a household name, but I'm willing to bet you’re one of the hundreds of million people who use his technology everyday.

Luis isn’t your average Unicorn tech founder. He actually pays his drivers to give feedback on their interactions with potential executive level hires on their way to the office from the airport to weed out toxic personalities.

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How I Built A $6.5 Billion App Called Duolingo | Founder Effect