Duolingo is the most popular way to learn a language online, with over 170 million users worldwide. Duolingo’s mission is to make quality education free, fun and accessible to all. It is the most downloaded app in the “Education” category on iTunes and Google Play, and the only education app to have been selected by Apple as “iPhone App of the Year.” Duolingo is 100% free, designed to feel like a game and scientifically proven to be effective. It is used both by students in developing countries and the richest man in the world, a testament to its work promoting educational equality for all. Pennsylvania’s most well-funded startup, Duolingo has raised $83.3 million from investors including Google Capital, Union Square Ventures, New Enterprise Associates, Kleiner Perkins, Ashton Kutcher and Tim Ferriss. The company was co-founded by Luis von Ahn, the serial entrepreneur and computer science professor known for inventing CAPTCHA/reCAPTCHA and receiving the MacArthur Genius grant.
The entrance to Duolingo's office.
The patio area - when the weather is nice, we open the garage door windows and it feels like being outside.
The micro-kitchen, where team members can make coffee and grab snacks.
A view of Duolingo's open-office plan, with team members hard at work.