Greyfu Login Captcha

Greyfu Login Captcha adds a secure verification step to your WordPress login form, helping block automated login attempts and brute-force attacks.

Lite Version (Free):
* Simple math-based captcha
* Multisite compatible
* Lightweight and fast
* No personal data stored or transmitted
* Works without any external service

Pro-Ready Features (Optional Upgrade):
* Infrastructure prepared for reCAPTCHA v2 integration
* Infrastructure prepared for hCaptcha integration
* API key fields included

The free version is fully functional on its own and does not require any external captcha service.

Third Party Services

This plugin optionally connects to external captcha services when the Pro features are enabled:

Google reCAPTCHA (Optional)
When reCAPTCHA is enabled in Pro settings, the plugin sends verification requests to Google’s reCAPTCHA service.
– Service: https://www.google.com/recaptcha/
– Privacy Policy: https://policies.google.com/privacy
– Terms of Service: https://policies.google.com/terms
– Data sent: User’s IP address and reCAPTCHA response token
– When: Only during login form submission when reCAPTCHA is enabled

hCaptcha (Optional)
When hCaptcha is enabled in Pro settings, the plugin sends verification requests to hCaptcha service.
– Service: https://www.hcaptcha.com/
– Privacy Policy: https://www.hcaptcha.com/privacy
– Terms of Service: https://www.hcaptcha.com/terms
– Data sent: User’s IP address and hCaptcha response token
– When: Only during login form submission when hCaptcha is enabled

The free/lite version uses a built-in math captcha that does not connect to any external service.

Support / Contact

For issues or questions, please contact us:
Email: [email protected]
Website: https://greyfu.com