# mCaptcha - mCaptcha

# Defend Like Castles

mCaptcha is proof-of-work based captcha system that is privacy focused and fully automated.

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Libre software GitHub

## Privacy focused

Doesn't track, doesn't profile your users.

## Robust and Accurate

Got users behind NATs? No issues. We don't use IP address for rate-liming. NAT or not you get the mCaptcha experience.

## Best-in-class UX

mCaptcha is silent, so silent that your users won't even feel it. No more annoying images, no more helping for Big Brothers with their ML stuff

## Defend like castles

Our PoW-based solution defends fierily. mCaptcha makes attacking your site more expensive than what it will take for you to respond to the attacker's requests

## Libre Software

Client libraries are licensed using proprietary-friendly free software licenses but the core is AGPL'd. We believe this is a tech that can change the way the web works so mCaptcha will always be free

## xCaptcha drop-in replacement

Already using a captcha solution? No worries, our APIs are compatible with reCAPTCHA and hCaptcha!