For a fundamentals exam like SC-900, Udemy's low prices are hard to argue with. The SC-900 prep: Microsoft Security, Compliance, Identity course is a self-paced video course from an independent instructor, often on sale from $12.99, with lifetime access and an instructor Q&A board, and Udemy's public reviews help you compare it with other SC-900 courses.
Udemy itself offers no baseline diagnostic, readiness score or adaptive plan for individual learners. Separate practice-test courses report scores per attempt, and the AI Assistant is limited to courses in Udemy's GenAI program. With SC-900, where many terms sound alike, finishing the videos is not the same as knowing Defender from Sentinel under time pressure.
Edureify's Diagnostic shows which SC-900 areas you already know, often useful if you work in IT, then concentrates practice on Microsoft security solutions, the largest domain, and on whichever of Entra or Purview is weaker, updating your Readiness Score as you go.