The world's largest course marketplace, currently being absorbed into the Coursera ecosystem (announced Dec 2025). While it offers 210,000+ courses, it has faced criticism for a 'subscription-first' pivot that de-prioritizes individual purchases and significantly reduces instructor payouts. In 2025, it integrated 'Udemy Intelligent' AI to help students find learning paths and summarize transcripts.

The 'Netflix of Education,' offering cinematically produced courses taught by world-class celebrities and industry titans. In 2025, it has expanded into AI-strategy courses and professional certifications. While unmatched for inspiration and storytelling, it is often criticized for being 'too passive' for users who need deep technical training or direct instructor feedback.