OpenClassrooms (formerly Le site du Zéro or SdZ) is a website that offers courses about computer science and entrepreneurship. Online courses can be made both by site staff, professors of universities or colleges partner as by its members.

Today, courses are available in several formats: MOOC (Massive Open Online Course), web text, e-book, book and video. The company delivers certifications for certain courses, including one recognized by the state in partnership with IESA multimedia.