Quizlet is an online flashcard and study tool created in 2005 by Andrew Sutherland that allows users to create digital flashcards, tests, and study games. It started as a free service but now offers paid subscriptions that provide additional features like image and audio uploading. While it has expanded its product offerings, Quizlet is still primarily funded through Google AdSense promotions and profits from board member Dave Margulius' company rather than outside investments. It sees opportunities to continue growing by improving education and expanding to an institutional level, and competes with other flashcard and study apps like StudyBlue, DuoLingo, and Anki.