Captcha-diensten

ALTCHA is a privacy-first, self-hosted CAPTCHA and bot protection platform with on-premise Sentinel for enterprise-grade security.

Captcha.eu offers GDPR-compliant bot protection that runs invisibly or via a simple widget to distinguish real users from bots without tracking.

CaptchaFox is a GDPR-compliant, privacy-first bot protection service based in Germany that guards websites against automated threats with adaptive detection and low-friction verification.

Friendly Captcha is a privacy-first, invisible CAPTCHA solution that defends websites from bots using background proof-of-work puzzles and automated risk signals.

Privacy-first, GDPR/CCPA-ready CAPTCHA service that protects forms and APIs with an invisible cryptographic task, deployed in the EU.

TrustCaptcha is a GDPR-compliant, EU-hosted CAPTCHA alternative that protects websites from bots without puzzles, boosting conversions while maintaining accessibility.