Language-learning app Duolingo makes around $500 million annually, despite offering all of its lessons for free. WSJ explores how the company is using AI and A/B testing to keep users hooked.

If you wanted to learn a language this year, you may have turned to the popular language-learning app Duolingo. Now, you can see how well you performed in your learning journey with Duolingo's ...

Many are now taking a crash course. The popular language-learning app Duolingo reported roughly 216% growth in new Mandarin learning in the U.S. compared to this time last year, with a sharp spike ...

12 analysts have expressed a variety of opinions on Duolingo DUOL over the past quarter, offering a diverse set of opinions from bullish to bearish. The following table provides a quick overview ...