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Duolingo is the world's largest online language learning platform, with over 150 million users. Our apps were selected by Apple as "iPhone App of the Year" and by "Google as Best of the Best for Android", 2 years in a row. Unlike other online education platforms, Duolingo is a completely digital experience meaning it requires constant interaction and is native to computers / mobile platforms. We're funded by some of the world's most prestigious venture capital firms, the investors behind Google, Twitter, and Tumblr. Duolingo is a spinoff from Carnegie Mellon University's School of Computer Science. Luis von Ahn, co-founder and CEO of Duolingo, is a MacArthur fellow, Carnegie Mellon University professor, and the inventor of CAPTCHA.