ALTCHA 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. For more details, visit ALTCHA. Features Frictionless Experience: Utilizes proof-of-work (PoW) instead of visual puzzles, ensuring a seamless user experienc...