Duolingo, Inc.

Based in Pennsylvania, US, Duolingo, Inc. was founded in 2011 by co-founders Luis von Ahn and Severin Hacker. The company is a mobile learning platform with over 40 million monthly active users, and provides courses in 40 languages as of 2021. The firm became a publicly listed company in July 2021 on the Nasdaq under the ticker symbol DUOL.

Duolingo has raised a total of USD 183. 3 million in funding. The company raised the funding in November 2020 from a Series H round from lead investors Durable Capital Partners and General Atlantic. The company has 500 employees.

The company's platform gathers data on how people learn in order to enhance the platform's efficacy over time, allowing users to self-learn multiple languages for free. Duolingo is a language-learning education platform that offers 98 total courses. The platform enables anyone to pay USD 7 each month for a premium service that removes ads, delivers offline access, and more. The company provides Duolingo for Schools with features designed to allow teachers to track their students.

It uses many services in the Amazon Web Services suite of products, including Amazon DynamoDB, Amazon Virtual Private Cloud, nearly 200 virtual instances in Amazon Elastic Compute Cloud (EC2), Amazon Simple Storage Service (S3) and Amazon Relational Database Service (RDS). The company uses the freemium model; the app and the website are accessible without charge, although Duolingo also offers a premium service for a fee. Duolingo has a post-money valuation in the range of $1B to USD 10 billion as of November 2020. The company generated a revenue of USD 161,696 as of December 2020.