MIT OpenCourseWare
Free course materials from MIT, including lectures and problem sets.
Cost
Completely free
Free. No certificate.
Open source
No
The code is private. You depend on the company that makes it.
Your data
Goes to their servers
Your files and text are sent to the company running the service.
Use it for this
Serious depth in a subject, at university level, for free.
Do not use it for this
Casual learning. These are real courses with real difficulty.
A moment where you would reach for it
Working through an actual statistics course rather than reading summaries of one.
How hard is it to pick up?
Takes real effort to learn. Worth it if you need what it does.
Other things that do this job
No tool is best at everything. These solve a similar problem, with different trade-offs.
About this entry
Checked on 1 Sept 2026. Prices and free limits change without warning, and often quietly. Treat everything above as a starting point and confirm on the official site before you rely on it.
Nothing here is sponsored. A tool appears because it solves a real problem, not because someone paid for it to be listed.