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Open Source CAPTCHA & Bot Protection Tools using Bun

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

Cap

Privacy-first CAPTCHA alternative with proof-of-work

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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:

hCaptcha

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