Sublime
An inspiration engine for ideas
Duolingo outlines its mission, company culture, and guiding principles for creating an exceptional educational product, emphasizing long-term thinking, excellence, efficient execution, data-driven decision-making, and a fun, engaging learning experience.
LinkHow to Make Learning as Addictive as Social Media | Luis Von Ahn | TED
youtu.be
LingoLooper - The natural way to learn a language on iOS and Android
lingolooper.com

It supports over 40 languages and has 40M users. For context, there are more people in the United States learning languages on Duolingo than there are foreign language learners in all US high schools combined.
Tanay Jaipuria • Duolingo and Consumer Subscription Businesses
