The simple captcha plugin was developed to keep the WordPress website safe. Captcha helps protect you from spam and password decryption by asking you to complete a simple test that proves you are human and not a computer trying to break into a password-protected account.

Simple and Easy CAPTCHA. Protects WordPress forms against spam bots by using a picture based challenge enabling users to solve it quickly and easily

WP Light Captcha is very simple and lightweight captcha plugins for your WordPress site.You can protect unwanted login request from hackers.

Captcha image for registration page, customize according to your theme.