Udemy

Udemy offers the largest course library of any platform on this list with 250,000+ courses, but quality control is minimal, as anyone can publish. However, top-rated courses on Python, web development, and cloud certifications rival those on #6 edX in depth and practical value, often at a fraction of the cost—sales drop prices from $200 to just $10-15 per course. Over 75 million students have enrolled, and you own purchased courses forever, unlike subscription-based #7 LinkedIn Learning. For technical skills, Udemy’s best instructors attract millions of students, making it a solid choice for budget-conscious learners.