Duolingo is owned by its co-founders, Luis von Ahn and Severin Hacker, along with various investors who have funded the company over the years. To address the ownership of Duolingo, it is important to note that the company was founded by Luis von Ahn and Severin Hacker. These co-founders, along with a range of investors who have provided financial backing throughout the company's development, collectively hold ownership stakes in Duolingo. This diversified ownership structure has enabled Duolingo to grow and expand its language-learning platform.