The Duolingo logo, used by the language-learning platform, consists of the brand name written in bright green lowercase letters with rounded, soft endings. In Duolingo’s visual identity, this wordmark is built on custom letterforms inspired by the curves and outlines of the Duo mascot, while the brand’s core color is Feather Green. The brand’s visual system also makes active use of Duo the owl, both as a silhouette and as a fully illustrated character. The name Duolingo is formed from the words duo and lingo, which fits well with the idea of learning languages through a friendly digital service.
Duolingo was founded by Carnegie Mellon engineers Luis von Ahn and Severin Hacker with the mission of creating the best education in the world and making it available to everyone. Today, the company describes itself as the world’s leading mobile learning platform, and its flagship app as the most popular way to learn languages. The service is especially known for its short gamified lessons, motivation system, and for expanding beyond languages over time by adding subjects such as math and music. According to the company’s official data, in 2025 Duolingo had 40.5 million daily active users and 116.7 million monthly active users, which clearly shows its global scale.
