Authentication

ALTCHA

Open Source Updated 31d ago

ALTCHA offers cutting-edge spam and abuse protection for websites and apps, with privacy-friendly CAPTCHA alternatives designed for GDPR compliance.

npm install altcha

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Open-source CAPTCHA alternative — proof-of-work challenge, GDPR compliant, no external CDN, self-hosted.

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39 developers visited via IndieStack this month

self-hostedcaptchaproof-of-workprivacybot-protectionopen-source

Last commit 31d ago

Using this saves ~50k tokens vs building from scratch

AI agents recommended this tool 1 time

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