shouldiuse.io

Categories

VERDICT

Exercism Review

Worth it

Should I use Exercism?

Develop fluency in 83 programming languages — 100% free - exercism.org

· 1 month ago

Buy if you already code and want free practice and mentorship across 83 languages. Do not rely on it to learn programming from zero, and don't expect team or org training features.

Confidence

Medium. Based on ~20 public sources: official site, Reddit, Hacker News, Trustpilot, and security advisories. Some snippets were truncated.

Ratings

  • Value for money
  • Ease of use
  • Feature depth
  • Support quality
  • Security posture

Pricing

$0

Free

ModelNonprofit
Monthly feesNot disclosed
HardwareNot disclosed
Free tierYes

Best for

  • Devs practicing a new language
  • Self-taught coders wanting free mentor feedback
  • Career switchers sharpening existing skills
  • Fans of local-first, open-source tools

Not for

  • Total beginners needing guided from-zero lessons
  • Companies wanting team training features — no Teams product yet
  • Interview-prep grinders (LeetCode fits better)
  • Buyers needing SLAs, support guarantees, or SSO

Gotchas - check before you buy

medium

2024 restructure over finances — free product's long-term runway is uncertain.

medium

Mentorship speed varies by language; some tracks lack volunteer mentors.

medium

Newbies report it assumes prior experience — pair it with a beginner course.

medium

No org plans, SSO, or admin controls — don't buy it for company training.

Pros and cons

Pros

  • 100% free, donation-funded — no paid tier nagging you
  • 83 language tracks, including niche ones like Odin and Arturo
  • Free crowd-sourced human mentorship on your solutions
  • Solve exercises locally in your own editor via CLI
  • 2M+ users mean active community and discussion

Cons

  • Practice tool, not a from-zero teaching method
  • Nonprofit admitted 'no money in the bank' in 2024
  • Mentor feedback depends on scarce volunteers
  • No teams or organization features available yet

Sources & method

- 8 sources - No product breach found; minor CVEs affect the CLI tool, and no dedicated security page surfaced.

official x2review x4security x1news x1
  • CVE-2025-61723: quadratic complexity issue, Red Hat Bugzilla tracks a quadratic-complexity CVE associated with exercism.
  • Fedora advisory for Exercism CLI 3.2.0, Memory-issue security advisory against the Exercism CLI package on Fedora 37.
  • Polyfill vulnerability discussion, Community forum thread discussing a polyfill vulnerability affecting the site.

Key stats

  • Value for money: 5/5

    Rating

  • $0

    Starting price

  • 8

    Sources

  • Analyzed

  • Value for money: 5/5. Everything free; donations optional
  • Ease of use: 3/5. Beginners report confusion; assumes some experience
  • Feature depth: 4/5. 83 tracks, syllabi, mentorship, local CLI
  • Support quality: 2/5. Volunteer mentors; shortages reported in some languages
  • Security posture: 3/5. Minor CLI CVEs; no dedicated security page found
  • $0 Price 100% free, donation-funded
  • 2M+ Users cited in 2024 founder blog
  • 83 Languages practice tracks from Python to niche ones
  • Nonprofit Model donations; 2024 restructuring over finances

Pricing

Free

$0

  • All 83 language tracks
  • Community mentorship
  • Donation-supported

Security

No product breach found; minor CVEs affect the CLI tool, and no dedicated security page surfaced.

  • CVE-2025-61723: quadratic complexity issueRed Hat Bugzilla tracks a quadratic-complexity CVE associated with exercism.⁸
  • Fedora advisory for Exercism CLI 3.2.0Memory-issue security advisory against the Exercism CLI package on Fedora 37.
  • Polyfill vulnerability discussionCommunity forum thread discussing a polyfill vulnerability affecting the site.

What users say

Users love it as a free practice tool but repeatedly say it's for practicing, not learning to code from scratch.

“Exercism is great and free!”
Reddit, r/learnprogramming
“Exercism.io isn't for learning to code, but for practicing”
Reddit, r/AskProgramming
“Exercism is worthy of 120$ a year and worth it”
Hacker News
Full analysis

Based on ~20 public sources: official site, Reddit, Hacker News, Trustpilot, and security advisories. Some snippets were truncated.

Free, well-loved practice platform for 83 languages. Great for sharpening skills; not a from-zero teacher.

Methodology

Based on ~20 public sources: official site, Reddit, Hacker News, Trustpilot, and security advisories. Some snippets were truncated.

Read how a report is made.

Sources

  1. Exercism homepage — 100% free, 83 languagesexercism.org
    official
  2. 2M users but no money in the bank — Sept 2024 restructureexercism.org
    official
  3. Exercism.io isn't for learning to code, but for practicingreddit.com
    review
  4. Exercism is great and free — Redditreddit.com
    review
  5. 2M users but no money in the bank — Hacker Newsnews.ycombinator.com
    news
  6. Exercism desperately needs Rust mentorsusers.rust-lang.org
    review
  7. Exercism Teams... Coming soon?forum.exercism.org
    review
  8. CVE-2025-61723 exercism: Quadratic complexitybugzilla.redhat.com
    security

Add this review to your site

Exercism earned a Worth it check.

Put the badge on your site, pricing page, or docs.

Visitors see an independent review.

The link points here, and search engines follow it.

This is the badge visitors see on your site.

Worth it Exercism Independent review on Should I Use It

Paste one snippet. Keep the link as it is. A nofollow tag stops search engines from following it.

Rate this review

Anonymous. You can change your vote.

Loading votes…

Comments

One queue. No nested comments. Give a display name first. Limit: 200 words per comment and 7 comments per day. You can edit or delete yours.

Save a name to write a comment.

0 / 200 words

No comments yet.