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Open Source Projects tagged "Anti Abuse"

A curated collection of the best open source projects tagged "Anti Abuse". Each listing includes a website screenshot along with a detailed review of its features.

Cap

Privacy-first CAPTCHA alternative with proof-of-work

  • Stars

    Stars growing over the last 30 days8,282

  • Last commit

    1 day ago

  • License

    Apache-2.0
Lightweight open-source CAPTCHA solution using SHA-256 proof-of-work. 250x smaller than hCaptcha, fully customizable, and privacy-focused with zero telemetry.

Open Source Alternative to:

reCAPTCHA

ALTCHA

Next-Gen CAPTCHA and Spam Protection, GDPR compliant

  • Stars

    2,884

  • Last commit

    17 days ago

  • License

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

Open Source Alternative to:

reCAPTCHA

Private Captcha

GDPR-compliant bot protection without user friction

  • Stars

    199

  • Last commit

    10 hours ago

  • License

    Unknown
Privacy-first CAPTCHA service that blocks bots while keeping forms accessible. No puzzles, no tracking, no cookies - just invisible cryptographic protection.

Open Source Alternative to:

reCAPTCHA
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