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Best Free Online Course Platforms
Short answer: Khan Academy is the best fully free option; Alison and edX let you finish courses free and pay only for certificates.
See every plan side by side in the price tracker or try the platform quiz.
| Khan Academy | Alison | edX | Duolingo | Coursera | |
|---|---|---|---|---|---|
| Pricing model | Core library free | Free courses; optional paid certificates | Per course; free audit track or paid verified track | Free with ads; Super Duolingo subscription | Coursera Plus $59/month or $399/year; single courses and programs $49–$79/month |
| Free option | Everything core is free | Study and complete free | Audit track: temporary access to course materials, no graded assignments or certificate | Full course content free | Many courses can be audited free; certificates require payment |
| Certificates | Not a certificate platform | Free learner record; certificates sold in Alison's shop, some courses include free digital ones | Verified certificate on the paid track | No (Duolingo English Test is a separate product) | Yes, certificates for completed courses |
How we chose
Platforms where meaningful learning is free, per each platform's own help pages.
Sources
- Khan Academy Help: Does it cost money?
- Khan Academy Blog: Khanmigo for teachers
- Alison Help: Is Alison really free?
- Alison Help: How do I get my certificate?
- edX Help: Audit vs verified
- edX Help: What does it cost to take a course?
- Duolingo Help: Super Duolingo
- PCMag: Duolingo review
- Duolingo Super
- Duolingo Terms
- Coursera Plus page
- Coursera Help: Coursera Plus (trial and refund terms)
Facts checked October 15, 2026. Prices are US list prices, change often and vary by region; confirm on the provider's site before buying.