Quizlet

Quizlet runs a web and mobile study platform where students and teachers create and study flashcards, practice tests, games and AI-assisted study guides. It serves over 60 million monthly active users. It makes money from a freemium model, with paid subscriptions such as Quizlet Plus. It was founded in 2005 and raised $62M in total. The last round was a $30M Series C led by General Atlantic in May 2020, at a reported $1B valuation. It acquired the AI note-taking app Coconote.

Top 100 SaaS by revenue (GetLatka). A SaaS company retooling its product to be AI-native.