altcha

ALTCHA is a self-hosted, privacy-first security solution designed to protect websites, APIs, and online services from spam and abuse using an innovative proof-of-work (PoW) mechanism. Unlike traditional CAPTCHAs, it avoids intrusive methods like cookies or fingerprinting, ensuring robust protection while respecting user privacy.

Key Features:

• Frictionless Experience: Uses PoW instead of visual puzzles for seamless user interaction.
• Accessibility: Compliant with WCAG 2.2 AA-level standards and the European Accessibility Act (EAA).
• Cookie-Free & GDPR-Compliant: No tracking or cookies by default.
• Lightweight: Minimal bundle size (~29 kB GZIPped) for fast performance.
• Self-Hosted: No reliance on third-party services.
• Code Challenges (v2): Supports accessible image/audio-based verification.

Target Audience:

• Developers and organizations seeking privacy-compliant anti-spam solutions.
• Websites, APIs, and services requiring accessible, low-friction bot protection.

Framework Support:

• Works as a Web Component, compatible with modern frameworks including Svelte, React, Vue, Angular, and more.
• Server integrations available for TypeScript, PHP, Go, Python, Java, Ruby, and Elixir.

Compliance:

• Meets GDPR, HIPAA, CCPA, PIPEDA/CPPA, LGPD, DPDPA, and PIPL regulations.

For details, visit altcha.org .