Before Luis von Ahn co-founded Duolingo, a gamified language-learning app used by hundreds of millions around the world, he was fixated on squiggly letters. The entrepreneur was a co-inventor of CAPTCHA and reCAPTCHA, or those security prompts you get while browsing the web to verify if you are a human or if you are a … Continue reading Discover how Duolingo started with CEO Luis von Ahn at Disrupt 2021