google-recaptcha.md

product: "Google reCAPTCHA"
type: "Captcha"
layout: replace

Replace Google reCAPTCHA

Securimage

Securimage is an open-source free PHP CAPTCHA script for generating complex images and CAPTCHA codes to protect forms from spam and abuse.

{% infobox %}

• Website: phpcaptcha.org
• Source code: GitHub
• License: BSD 2-Clause "Simplified" {% endinfobox %}

FriendlyCaptcha

FriendlyCaptcha is a proof-of-work based CAPTCHA in which the user's device does all the work.

{% infobox %}

• Website: friendlycaptcha.com
• Source code: GitHub
• License: MIT {% endinfobox %}