2018年6月22日 · First funding, at two years and one month from founding: In October 2011, Duolingo raises $3.3 million from Union Square Ventures, Ashton Kutcher and Timothy Ferriss.. Private beta, at two years and two months from founding: Duolingo starts its private beta on November 30, 2011.Over 300,000 people sign up, thanks to a TED talk that von Ahn gives at the time, which is viewed by more than one ...