ALTCHA

ALTCHA is a GDPR, WCAG 2.2 AA, and EAA compliant CAPTCHA alternative that protects websites from spam and abuse without compromising user privacy. Unlike traditional CAPTCHAs, ALTCHA uses a proof-of-work (PoW) mechanism to verify human interaction, ensuring accessibility and privacy compliance.

Key Features

• Privacy-Friendly: No tracking, cookies, or personal data collection, fully compliant with GDPR, WCAG 2.2 AA, and EAA.
• Self-Hosted: Complete control over deployment and data, with no reliance on third-party services.
• Proof-of-Work (PoW): Uses computational challenges to distinguish humans from bots without invasive checks.
• Accessible: Designed to be inclusive, supporting users with disabilities and screen readers.
• Lightweight & Fast: Minimal client-side footprint with efficient server-side verification.
• Customizable: Supports theming, custom challenges, and integration with various frameworks.
• Open Source: Free to use, modify, and distribute under the MIT license.

Tech / Self-Hosting

ALTCHA is built with modern web standards and can be self-hosted on any server or platform. It supports:

• Frontend Integration: Works with vanilla JavaScript, React, Vue, Svelte, and other frameworks.
• Backend Verification: Compatible with Node.js, PHP, Python, Go, and more.
• Docker Support: Easy deployment using Docker containers for scalable setups.
• No External Dependencies: Operates independently without requiring third-party APIs or services.