| Founded | 2026, ten days ago | 2008, 18 years ago | 2001, 25 years ago | Free courses since 2008 | 2012 era |
| Courses | 286 plain English courses, growing daily | Courses built from 10,000+ videos, strongest in school maths and science | 2,500+ real MIT courses, the deepest catalog here | About 100 full length college courses | Thousands, from real universities |
| Books included | 649 complete classic books in the same library, with guides and audio | No book library | Course readings, not a public library | Open textbooks inside some courses | No |
| Practice | Quizzes on 5 certificate courses. Our biggest gap, stated above | Tens of thousands of exercises. Best in the world at this | Problem sets and exams from real MIT classes, mostly files to download | An exam at the end of each course | Graded work, often behind the paywall |
| Price | $0 for everything, and new students get 60 bucks to start | Lessons free. The AI tutor, Khanmigo, costs $44 a year | Materials free | Courses free. Some credit bearing exams and partner degrees cost money | Free to look. Certificates and degrees cost money, degrees cost thousands |
| Account to start | None. Click and learn | Not required, but sign in prompts and accounts are pushed throughout | None | Needed for exams and certificates | Required |
| Popups and banners | None. No donation banners, no upsells, no modals, no autoplay | Donation banners and appeals are a regular part of the experience, on top of sign in prompts | Few. It is a quiet site | Few | Upsells to paid certificates, degrees and subscriptions |
| Speed and weight | Static documents: homepage HTML is 32 KB plus one small stylesheet, cached worldwide. Built for cheap phones | A large web application: lessons load inside heavy JavaScript, with accounts, progress tracking and an AI tutor attached | Homepage HTML alone measured about 893 KB when we checked on October 25, 2026. Powerful, and heavy | A course platform: pages wait on the platform and your account | Large platforms: video players, paywalls and tracking on every page |
| Languages | Library in 16, courses in 6 and climbing | About 50 | Mostly English | English | Many, varies by course |
| Certificates | 5 courses, free, verifiable online. Not accredited, and we say so | No public certificates | None | Free certificates, and college credit on some courses through partner schools. A real strength | Yes, paid |
| Budget | One founder, a small team, AI help, community builders | Tens of millions of dollars a year in donations | Part of MIT | One foundation | Large companies and university partners |