GitHub Open Source Insight
Computed at Sep 11, 2026GitHub repo leaderboard by stars, growth rate and activity.
tiagozip
Free, open-source and self-hosted CAPTCHA alternative to reCAPTCHA. Privacy-first and powered by proof-of-work and instrumentation challenges.
JavaScript7,740 starslast pushed 7 days agoaltcha-org
GDPR, WCAG 2.2 AA, and EAA compliant, self-hosted CAPTCHA alternative with PoW mechanism.
TypeScript2,747 starslast pushed 5 days agomCaptcha
A no-nonsense CAPTCHA system with seamless UX | Backend component
Rust2,487 starslast pushed 11 months agoFriendlyCaptcha
The widget and docs for the proof of work challenge used in Friendly Captcha. Protect your websites and online services from spam and abuse with Friendly Captcha, a privacy-first anti-bot solution.
TypeScript450 starslast pushed 2 months agoprosopo
Open-source, frictionless CAPTCHA and bot defense. A privacy-focused alternative to reCAPTCHA and hCaptcha.
TypeScript298 starslast pushed 7 hours agoWebDecoy
Self-hosted, invisible CAPTCHA that detects AI agents driving real browsers. GDPR, WCAG 2.2 AA, and EAA: no cookies, no third-party data sharing, and no visual or audio puzzle. With a false-positive budget enforced in CI. Proof of work, drop-in for Turnstile and reCAPTCHA.
JavaScript207 starslast pushed 4 hours agoxyTom
Cap backend server build on Cloudflare worker, modern open-source CAPTCHA alternative using SHA-256 proof-of-work.
HTML197 starslast pushed 1 year agoPrivateCaptcha
Independent, privacy-first, self-hostable PoW CAPTCHA service made in EU
Go193 starslast pushed 11 hours ago
| # | Repo | Language | Stars | 30-day trend | Last updated |
|---|---|---|---|---|---|
| 1 | tiagozip Free, open-source and self-hosted CAPTCHA alternative to reCAPTCHA. Privacy-first and powered by proof-of-work and instrumentation challenges. | JavaScript | 7,740 | last pushed 7 days ago | |
| 2 | altcha-org GDPR, WCAG 2.2 AA, and EAA compliant, self-hosted CAPTCHA alternative with PoW mechanism. | TypeScript | 2,747 | last pushed 5 days ago | |
| 3 | mCaptcha A no-nonsense CAPTCHA system with seamless UX | Backend component | Rust | 2,487 | last pushed 11 months ago | |
| 4 | FriendlyCaptcha The widget and docs for the proof of work challenge used in Friendly Captcha. Protect your websites and online services from spam and abuse with Friendly Captcha, a privacy-first anti-bot solution. | TypeScript | 450 | last pushed 2 months ago | |
| 5 | prosopo Open-source, frictionless CAPTCHA and bot defense. A privacy-focused alternative to reCAPTCHA and hCaptcha. | TypeScript | 298 | last pushed 7 hours ago | |
| 6 | WebDecoy Self-hosted, invisible CAPTCHA that detects AI agents driving real browsers. GDPR, WCAG 2.2 AA, and EAA: no cookies, no third-party data sharing, and no visual or audio puzzle. With a false-positive budget enforced in CI. Proof of work, drop-in for Turnstile and reCAPTCHA. | JavaScript | 207 | last pushed 4 hours ago | |
| 7 | xyTom Cap backend server build on Cloudflare worker, modern open-source CAPTCHA alternative using SHA-256 proof-of-work. | HTML | 197 | last pushed 1 year ago | |
| 8 | PrivateCaptcha Independent, privacy-first, self-hostable PoW CAPTCHA service made in EU | Go | 193 | last pushed 11 hours ago |
All · 11,658