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250x smaller than hCaptcha
~20kb, zero dependencies, loads in milliseconds
CapSelf-hosted CAPTCHA for the modern web.
Lightweight, privacy-first, and designed to put you first. Switch from reCAPTCHA in minutes.
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Privacy-first
Cap doesn't send any telemetry back to our servers
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Fully customizable
Change the colors, size, position, icons and more with CSS variables
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Proof-of-work
Your users no longer have to waste time solving visual puzzles.
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Standalone mode
Run Cap anywhere with a Docker container with analytics & more
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Invisible
Hide Cap's widget and solve challenges in the background
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M2M
Keep your APIs protected while accessible to friendly robots
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Open-source
Completely free & open-source under the Apache 2.0 license