edX

edX is a premier, non-profit online learning destination originally founded as a joint venture between Harvard University and the Massachusetts Institute of Technology (MIT). Following its acquisition by 2U, it continues to serve as a massive global platform delivering incredibly rigorous, university-level coursework to millions of learners worldwide. Partnering with elite institutions like Oxford, Berkeley, and the Sorbonne, edX focuses heavily on providing accessible, high-caliber education in STEM, business, and the humanities. The platform is uniquely structured around comprehensive learning tracks. Beyond individual courses, edX offers "MicroMasters" programs—series of graduate-level courses that are formally recognized by universities and can often be applied as legitimate academic credit towards a full Master's degree on campus. They also provide intensive "Boot Camps" for rapid skill acquisition in coding and cybersecurity, and "Executive Education" courses designed specifically for corporate leaders and management professionals. **Pricing:** Similar to Coursera, edX allows users to "audit" the vast majority of its courses entirely for free, providing access to course materials but no certificate. To receive graded assignments, exams, and a verified university certificate, users must pay a one-time fee per course, which typically ranges from $29 to $199 depending on the institution.