Duolingo, Inc. is a technology company that operates a global digital learning platform focused primarily on language education. The company offers the Duolingo language learning app, which uses gamified lessons, adaptive learning technology, and data-driven personalization to help users build reading, writing, listening, and speaking skills across numerous languages. Its product portfolio also includes Super Duolingo, a premium subscription offering with enhanced features, the Duolingo English Test, an online, AI-driven assessment of English proficiency used by educational institutions and organizations, Duolingo for Schools to support classroom instruction, as well as Duolingo ABC for early literacy and Duolingo Math for numeracy skills. Duolingo, Inc. generates revenue from time-based subscriptions, in-app advertising, the Duolingo English Test, and in-app purchases, serving individual learners, schools, and institutional customers worldwide. Founded in 2011 and headquartered in Pittsburgh, Pennsylvania, the company plays a prominent role in the education technology and software application industry by providing accessible, mobile-first learning experiences at scale.