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

ALTCHA is a self-hosted CAPTCHA alternative that utilizes a proof-of-work mechanism for security without relying on cookies, ensuring user privacy and compliance with GDPR, WCAG 2.2 AA, and EAA standards. It offers a seamless user experience, lightweight design, and the flexibility of SaaS or self-hosted deployment. ALTCHA supports multiple web frameworks and languages, making it adaptable for various server and CMS integrations, while its compact bundle size significantly reduces loading times compared to traditional solutions like reCAPTCHA.