Duolingo is the world’s most popular way to learn a language. Their mission is to develop the best education in the world and make it universally available.Founded in 2011 by Luis von Ahn and Severin Hacker, Duolingo is the most downloaded education app in the history of the App Store and in 2019 became the top-grossing education app worldwide. The app has been awarded Apple's iPhone App of the Year and Android's Best of the Best.Learning a new language used to be expensive; Duolingo believe it should be free. Over 1.2 billion people are learning a second language and most of them are learning English to improve their lives.Learning a new language is hard; Duolingo believe it can be fun. Duolingo use bite-sized lessons that feel like playing a game to keep learners motivated. With over 500 million learners, Duolingo have unprecedented data insights on how people learn. Their teams of language learning scientists, machine learning engineers, and AI experts use this data to constantly improve their effectiveness. Duolingo are building a future in which the highest-quality education is accessible to all.