Busuu is an online language learning platform and community, founded in 2008 by Bernhard Niesner and Adrian Hilti, that offers courses created by language experts using proven, integrated strategies like spaced learning and micro-learning to help users improve their speaking, listening, reading, and writing skills. Acquired by Chegg in 2022, Busuu is now used by over 500 businesses for corporate language training, and its mobile app provides interactive community features and AI-powered speaking practice for its global users.