Coursera

Coursera hosts one of the largest catalogs of data science and AI courses from schools and tech companies worldwide. Learners can pursue specializations from Google and IBM, follow structured degree paths from Johns Hopkins and other universities, or sample individual courses to test topics before committing.

The platform works best for those who want recognized credentials and structured learning from established institutions. Quality varies across offerings, but top specializations provide solid foundations in data science fundamentals and applied machine learning.