Lightweight open source Google reCaptcha alternative: ALTCHA leverages a proof-of-work mechanism to safeguard your website, APIs, and online services from spam and abuse. Unlike traditional solutions, ALTCHA is self-hosted, does not rely on cookies or fingerprinting, and ensures complete user privacy. It is fully compliant with GDPR, WCAG 2.2 AA-level, and the European Accessibility Act. github.com/altcha-org/altcha

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GitHub - altcha-org/altcha: GDPR, WCAG 2.2 AA, and EAA compliant, self-hosted CAPTCHA alternative with PoW mechanism and advanced anti-spam filter.

GDPR, WCAG 2.2 AA, and EAA compliant, self-hosted CAPTCHA alternative with PoW mechanism and advanced anti-spam filter. - altcha-org/altcha

^GitHub