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Open Source CAPTCHA & Bot Protection Tools using Cargo

A curated collection of the best open source tools for distinguishing humans from bots (CAPTCHA) and preventing spam. using Cargo.

Cap

Privacy-first CAPTCHA alternative with proof-of-work

  • Stars

    Stars growing over the last 30 days8,149

  • 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

mCaptcha

Privacy-first proof-of-work CAPTCHA without user friction

  • Stars

    2,496

  • Last commit

    1 year ago

  • License

    AGPL-3.0
Privacy-focused proof-of-work CAPTCHA system that silently protects websites without tracking users or requiring image solving. Drop-in replacement for reCAPTCHA.

Open Source Alternative to:

reCAPTCHA
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