A curated collection of the 6 best open source alternatives to hCaptcha.
The best open source alternative to hCaptcha is Cap. If that does not suit you, we have compiled a ranked list of other open source hCaptcha alternatives to help you find a suitable replacement.
hCaptcha alternatives are mainly CAPTCHA & Bot Protection. Browse these if you want a narrower list of alternatives or are looking for a specific functionality of hCaptcha.
Lightweight open-source CAPTCHA solution using SHA-256 proof-of-work. 250x smaller than hCaptcha, fully customizable, and privacy-focused with zero te
Lightweight open-source CAPTCHA solution using SHA-256 proof-of-work. 250x...
ALTCHA offers cutting-edge spam and abuse protection for websites and apps, with privacy-friendly CAPTCHA alternatives designed for GDPR compliance.
ALTCHA offers cutting-edge spam and abuse protection for websites and apps...
Privacy-focused proof-of-work CAPTCHA system that silently protects websites without tracking users or requiring image solving. Drop-in replacement fo
Privacy-focused proof-of-work CAPTCHA system that silently protects websit...
A blockchain-based CAPTCHA solution offering improved security, user experience, and resistance to bot attacks for web applications.
A blockchain-based CAPTCHA solution offering improved security, user exper...
Privacy-first CAPTCHA service that blocks bots while keeping forms accessible. No puzzles, no tracking, no cookies - just invisible cryptographic prot
Privacy-first CAPTCHA service that blocks bots while keeping forms accessi...
Privacy-compliant CAPTCHA alternative using proof-of-work technology. Protects websites from bots and spam without user interaction or data tracking.
Privacy-compliant CAPTCHA alternative using proof-of-work technology. Prot...
