Free coding practice with human mentoring
Introduction
Exercism is a completely free platform of coding practice with human mentoring: 120+ language tracks, a local-practice CLI workflow, and volunteer-mentor code reviews on submission. The learn-plus-review model sets it apart among practice platforms — fully open-source and nonprofit.
Key Features
- 120+ language tracks
- Local CLI practice workflow
- Human mentor code reviews
- Graded syllabi
- Open-source nonprofit operations
Pros
- Mentor reviews add real learning value
- Totally free, no upsells
Cons
- Review wait times vary
Pricing
Completely free.（See official site for current pricing）
FAQ
Review wait time?
Usually hours to days.
Good for new languages?
Yes — syllabi are well structured for learning new languages.
As the main practice platform?
For language mastery yes; supplement with others for contests.
Related Sites
Collected on lucifer.city · Reviewed by the founder