Udemy's appeal for CISSP prep is straightforward: individual instructors publish self-paced video courses at prices that are a fraction of most competitors, often discounted further during sales. For a broad, judgment-heavy exam like the CISSP, though, the trade-off is that you're relying on one instructor's take on the material with no built-in mentoring, structured schedule, or practice ecosystem beyond what that specific course happens to include.
Course quality on Udemy also varies more than on a single-provider platform, since anyone can publish a course and reviews can be mixed even for popular listings. Candidates who choose this route typically spend extra time cross-checking a course's coverage of the full domain list against ISC2's official exam outline before committing, since there's no accreditation process ensuring a given course is comprehensive.
Where the two approaches diverge most is in what happens after you finish a lesson. A Udemy course moves on regardless of whether you've actually absorbed the material, since there's no mechanism tracking your retention. Edureify's Readiness Score exists specifically to catch that gap — it's built from how you perform on questions tied to each domain, so a concept you've watched but haven't internalized shows up as a weak spot the next day's study plan targets directly.