ALTCHA
Open-source alternative to hCaptcha, reCAPTCHA, Cloudflare Turnstile.
ALTCHA offers cutting-edge spam and abuse protection for websites and apps, with privacy-friendly CAPTCHA alternatives designed for GDPR compliance.
Open Source Alternative to:
ALTCHA offers cutting-edge spam and abuse protection for websites and apps, with privacy-friendly CAPTCHA alternatives designed for GDPR compliance.
Some key features of ALTCHA:
- Open-source alternative to hCaptcha, reCAPTCHA, Cloudflare Turnstile
- Application Security coverage
- GitHub stars, forks, license, last commit, and activity score synced from directory sources
- Codex course and interactive classroom previews attached to the repository detail page
Categories
Built with
Learning previews
Learn this project
Codex HTML Course
ALTCHA Codex HTML Course
Static preview slot
ALTCHA Codex HTML Course is being prepared for this directory project.
Interactive Classroom
ALTCHA Interactive Classroom
Static preview slot
ALTCHA Interactive Classroom is being prepared for this directory project.
Related projects
Cap
Unknown
Lightweight open-source CAPTCHA solution using SHA-256 proof-of-work. 250x smaller than hCaptcha, fully customizable, and privacy-focused with zero telemetry.
mCaptcha
AGPL-3.0
Privacy-focused proof-of-work CAPTCHA system that silently protects websites without tracking users or requiring image solving. Drop-in replacement for reCAPTCHA.
Procaptcha
Apache-2.0
A blockchain-based CAPTCHA solution offering improved security, user experience, and resistance to bot attacks for web applications.
Private Captcha
Unknown
Privacy-first CAPTCHA service that blocks bots while keeping forms accessible. No puzzles, no tracking, no cookies - just invisible cryptographic protection.
Friendly Captcha
MPL-2.0
Privacy-compliant CAPTCHA alternative using proof-of-work technology. Protects websites from bots and spam without user interaction or data tracking.
Infisical
Unknown
End-to-end encrypted secret management platform for seamless integration and enhanced security in development workflows.