Now a days spam attackers increase day by day they are attack on your website with putting spammy links. WordPress captcha plugin helps to stop spam attack and unwanted users from your WordPress website. This is basically a challenge to differentiate human and a computer software. A CAPTCHA is only solved by human being. So, here in our today’s post we have listed some of the amazing free registration captcha plugins for WordPress.
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Tick Captcha – Anti-Spam CAPTCHA
TICK takes human verification to the next level by integrating video verification into the CAPTCHA process. This not only increases security and is fool proof from bots but also is a brand new monetization method for publishers and a unique medium to advertise for brands. TICK comes in the form of a clean, sleek and customizable widget that can be easily integrated into the form section on your website, blog or forum.

Sweet Captcha
Sweet Captcha is a free image captcha service putting your users and your website at first priority. Our CAPTCHA protects your website from spam, using a fun and illustrated widget! No typing is required, our Captcha is fully interactive, sweet and easy to use! Sweet Captcha is fully integrated as a contact form 7 captcha, comments captcha, log-in captcha, registration captcha, password recovery captcha, custom contact form and more.

FunCaptcha – Anti-Spam CAPTCHA
Spammers abuse your site, but users hate typing out twisty letters or ad phrases (aka CAPTCHA and reCAPTCHA). Automated spam filters make mistakes and require constant checking. FunCaptcha presents a mini-game CAPTCHA that blocks the bots while giving your users a few moments of fun. It’s a real security solution hardened by experts and automatically updated to provide the best protection.

NoMoreCaptchas
Register for free to put an end to those annoying Captcha codes that slow down or even send away your users! NoMoreCaptchas authenticates human beings based on the one thing that can never be faked – their behavior. Developed at the University of Oxford, NoMoreCaptchas uses e-DNA (Electronically Defined Natural Attributes) to determine if a user is a human or a bot.

Cartpauj Register Captcha
Cartpauj Register Captcha does one simple task, and does it well. It prevents SPAM signups through WordPress’s default registration form. There are no settings to configure or get confused with. Adds CAPTCHA to the WordPress register sign-up form. Adds hidden honeypot input to further deter bots. Can replace the default WordPress logo on the login/register form (see note near bottom of “cartpauj-register-captcha.php” file for the how to.

WM Simple Captcha
WM Simple Captcha for registration page, customize captcha image according to your theme. Change image width, height, background color, set possible characters, add space between two characters, adjust font size, change form label, add your custom css, enable/disable refresh button, change refresh button. Many think more on customization.
