Cap
Lightweight open-source CAPTCHA solution using SHA-256 proof-of-work. 250x smaller than hCaptcha, fully customizable, and privacy-focused with zero telemetry.
6,990
Other
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Migliori alternative open source a hCaptcha
Privacy-focused CAPTCHA service that protects websites from bots and spam while respecting user data and offering machine learning training rewards.
hCaptcha6 tools
Strumenti open source
ALTCHA
ALTCHA offers cutting-edge spam and abuse protection for websites and apps, with privacy-friendly CAPTCHA alternatives designed for GDPR compliance.
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mCaptcha
Privacy-focused proof-of-work CAPTCHA system that silently protects websites without tracking users or requiring image solving. Drop-in replacement for reCAPTCHA.
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AGPL-3.0
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Procaptcha
A blockchain-based CAPTCHA solution offering improved security, user experience, and resistance to bot attacks for web applications.
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Apache-2.0
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Private Captcha
Privacy-first CAPTCHA service that blocks bots while keeping forms accessible. No puzzles, no tracking, no cookies - just invisible cryptographic protection.
167
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Friendly Captcha
Privacy-compliant CAPTCHA alternative using proof-of-work technology. Protects websites from bots and spam without user interaction or data tracking.
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MPL-2.0
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