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Platform comparison

Harvard CS50 vs edX

Head-to-head comparison: courses, certificates, cost, and who each platform is best for.

CS50 is Harvard's free computer science course. It lives at cs50.harvard.edu and is taught by David Malan. edX is the platform that hosts CS50 (as CS50x) alongside thousands of other courses from 350+ institutions. If you want CS50, go to cs50.harvard.edu. It is free and identical to the edX version. If you want an edX-verified certificate, pay through edX. edX wins on catalog breadth; CS50 wins on raw course quality for beginners.

CS50x on edX has enrolled over 4.5 million learners since 2012, making it one of the highest-enrollment courses in MOOC history (source: cs50.harvard.edu/x).

Harvard CS50vsedX

7 coursesCourses in our catalog2 courses

Free to start

YesNo

Certificates on listed courses

YesYes

In short

Harvard CS50: Computer Science, Python, C.

edX: Computer Science, Data Science, Programming.

Side-by-Side Comparison

FeatureHarvard CS50edX
Free to startYesNo
Certificates on listed coursesYesYes
Course count72
Focus areas
Computer Science
Python
C
Computer Science
Data Science
Programming

Harvard CS50

CS50 is Harvard University's introduction to computer science, widely considered the best free programming course ever made. It's rigorous, engaging, and taught by David Malan. The course covers C, Python, SQL, JavaScript, and more. Free to audit; certificate available for a fee.

Full Harvard CS50 review →

edX

edX is a nonprofit online learning platform founded by Harvard and MIT. It hosts university-level courses from top institutions worldwide. Most courses are free to audit. Verified certificates are paid. Covers computer science, data science, programming, and much more.

Full edX review →

Frequently Asked Questions

Is CS50 free on edX?

CS50x is free to audit on edX. The verified certificate costs $199. You can take the same course for free at cs50.harvard.edu without paying anything.

What is the difference between cs50.harvard.edu and edX for CS50?

The course content is the same. cs50.harvard.edu has the most current version with no payment required. edX is the place to pay for a verified certificate if you want one.

Is an edX CS50 certificate worth paying for?

It depends on your goal. The CS50x certificate from edX costs $199 and is recognized by many employers as a signal of foundational CS knowledge. If you are learning for personal growth, the free audit is sufficient.

What can I learn on edX beyond CS50?

edX offers courses in business, data science, AI, medicine, law, and engineering from MIT, Harvard, Berkeley, and Johns Hopkins. After CS50, edX has graduate-level programs and professional certificates in most technical fields.

Is CS50 or edX better for a beginner?

CS50 is the better choice for a complete programming beginner. It is one of the most carefully designed introductory CS courses available. edX as a platform has thousands of courses at all levels but quality varies widely depending on the instructor.

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