Compare course quality, certificates and subscription models
University-backed courses and degrees
Courses from universities and major employersProfessional certificates and full degreesFinancial aid available on many coursesStructured deadlines and peer reviewSubscription and per-course options
Enormous catalogue with lifetime access
Very large catalogue across practical skillsLifetime access to purchased coursesFrequent heavy discountingStudent ratings on every course30-day refund policy
University courses with audit options
Courses from major universitiesFree audit track on many coursesMicroMasters and professional certificatesVerified certificates availableFounded by universities
Production-led classes from notable practitioners
High production qualityTaught by well-known practitionersAnnual subscription covers everythingStrong on creative and personal subjectsNot designed around accreditation
Project-based creative learning
Project-based creative coursesFlat subscription for the whole catalogueCommunity project feedbackStrong design and illustration coverageShort-form lesson structure| Product | Coursera 9.6 | Udemy 9.1 | edX 8.5 | MasterClass 8.0 | Skillshare 7.4 |
|---|---|---|---|---|---|
| Highlights | Courses from universities and major employers · Professional certificates and full degrees · Financial aid available on many courses · Structured deadlines and peer review · Subscription and per-course options | Very large catalogue across practical skills · Lifetime access to purchased courses · Frequent heavy discounting · Student ratings on every course · 30-day refund policy | Courses from major universities · Free audit track on many courses · MicroMasters and professional certificates · Verified certificates available · Founded by universities | High production quality · Taught by well-known practitioners · Annual subscription covers everything · Strong on creative and personal subjects · Not designed around accreditation | Project-based creative courses · Flat subscription for the whole catalogue · Community project feedback · Strong design and illustration coverage · Short-form lesson structure |
Editorially scored by our research team.
Every score out of 10 is assigned by our editors from published pricing, features, fees, coverage and support terms — not from user-submitted reviews. Scores are our own opinion and change as products change. Read our full methodology.
Coursera is our top-scoring pick in Online Course Platforms, at 9.6/10 — it highlights “Courses from universities and major employers”.
Udemy scores 9.1 and is the one to compare against it — it highlights “Very large catalogue across practical skills”.
Both scores are our editors’ assessment of published specifications, pricing and terms against the criteria in our rating methodology — they are not aggregated customer reviews.
This single question narrows the market faster than any feature comparison, because platforms are built around very different outcomes.
If you need recognised credentials — something an employer or a professional body will accept — you want university-affiliated platforms offering accredited certificates, professional certificates from known employers, or full degrees. These cost more, have deadlines and assessment, and mean something outside the platform.
If you need a skill and nobody will ever ask for proof, a marketplace course at a fraction of the price does the job. The certificate is a completion record rather than a qualification, and treating it as more than that is the main way people waste money here.
Per-course purchase gives lifetime access to what you bought. Best for occasional, specific needs. Note that on the large marketplaces, list prices are heavily and near-permanently discounted — paying full price is almost always unnecessary.
Subscription covers a whole catalogue monthly or annually. Good value only if you genuinely study regularly; the common pattern is enthusiastic use for six weeks followed by eleven months of unused billing.
Audit tracks on university platforms let you watch the material free and pay only for the graded certificate. If you want the knowledge rather than the credential, this is frequently the best value available and is under-publicised.
Financial aid exists on several academic platforms and is genuinely obtainable. It is worth applying for rather than assuming it is nominal.
Open marketplaces let anyone publish, so quality varies enormously within a single platform. A few reliable signals:
Completion rates for self-paced online courses are notoriously low, and the reason is usually structural rather than personal. Courses with deadlines, cohorts and graded assessment are finished far more often than open-ended video libraries, even though the flexible option sounds more appealing.
If you know you struggle to finish things alone, that is an argument for a structured cohort-based course over a cheaper self-paced one — the more expensive option you complete is better value than the cheap one you abandon.
Practical habits that help: schedule fixed study times rather than intending to fit it in, do the exercises rather than only watching, and start something small enough to finish before buying a long specialisation.
Check the refund window and whether it depends on how much you have watched — some platforms void refunds once you pass a completion threshold. Check also whether access is genuinely lifetime or tied to an active subscription, and whether you can download materials for offline use.
One thing worth knowing about lifetime access: it means as long as the course remains on the platform. Instructors do remove courses, so download key resources if they matter.
Platform pricing, accreditation arrangements and refund terms change over time. Confirm current details on the provider's own site, and verify that any credential you are paying for is recognised by whoever you need to recognise it.