Duolingo founded by Severin Hacker
Duolingo ( DEW-oh-LING-goh) is an American educational technology company which produces learning apps and provides language certification.
The platform was founded in 2011 by Luis von Ahn and Severin Hacker and has since grown to become one of the most popular language learning apps in the world.
Duolingo offers over 40 different language courses, from popular languages, such as English and Spanish to less commonly studied languages, such as Welsh, Irish, and Swahili. Duolingo also offers the Duolingo English Test certification program and a literacy app for children called Duolingo ABC, and the company released an elementary level math app called Duolingo Math currently exclusive to iOS.The company uses a freemium model with over 500 million registered users. Duolingo offers a premium service which eliminates advertising and offers more features.