CAPTCHA (“Completely Automated Public Turing test to tell Computers and Humans Apart”) is a type of challenge-response test. It’s used in computing to determine whether or not the user is human.
This user identification procedure has received many criticisms, especially from disabled people. But it also received complaints from other people who feel that their everyday work is slowed down by distorted words that are difficult to read. It takes the average person approximately 10 seconds to solve a common CAPTCHA.
There are many CAPTCHA plugins in WordPress that can help you protect your sites from spam, checking whether the user us human or not.
In this article I’ll list you the most popular of them.
This plugin is the best security solution that protects your WordPress website forms from spam entries by means of math logic. You can use it for login, registration, password recovery, comments and popular contact forms.
This plugin is a powerful WordPress shield which allows you to protect your WordPress website from SPAM. Display Captcha on Login Form, Registration Form, Comment Form, Admin Comment form, Contact Bank Form and Hide Captcha for registered users easily.
This plugin is for registration page, customize captcha image according to your theme. You can 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.
This plugin does not work alone and is intended to work with other plugins. It is originally created for Contact Form 7, anyway, you can use it with your own plugin.
Just note that this product is “really simple” as its name suggests, i.e., it is not strongly secure. And if you need perfect security, you should try other solutions.
5 . Captcha Code
This plugin adds Captcha Code anti-spam methods to WordPress forms. Forms include comments form, registration form, lost password form and login form. To post comments or register, users will have to type in the code shown on the image. This will prevent spam from automated bots and will add security.
This plugin provides interesting and unique captchas to enhance and secure your WordPress pages. It included blocks spam and filters posted user Comments for inappropriate content. Additionally, its new SPAM COUNTER feature provides you with an indication of the nature and magnitude of the spamming activity directed against your WordPress pages.
This is a clickable plugin, picture CAPTCHA that stops spam and malicious bots, while remaining a very easy CAPTCHA for people to solve. So all your website visitors have to do is click a few specific pictures on the CAPTCHA to prove they are human and not a bot. Confident CAPTCHA takes just some seconds to solve. You can use this plugin to stop spam and bots on comment forms, logins, registration forms and password resets.
This plugin does one simple task, and does it well. It prevents SPAM signups with WordPress’s default registration form. There are no settings to configure or get confused with, you just activate and watch those SPAM sign-ups fade away! This plugin blocks bots by using two different methods to deter bots: 1- it adds a CAPTCHA code which can only be read by humans. 2- it adds a field which is only visible to bots . Bots attempt to fill out all fields when they SPAM forms — so if we detect input in the hidden field, we know it was a bot, and the signup is rejected.
This widget works easily on registration and comment forms, as well as Contact Form 7, Gravity Forms and Ninja Forms. You can keep your anti-spam solutions like Akismet, though you won’t need to check those filters as often. You can automatically show FunCaptcha once your user submits the form, instead of displaying it on your page.
10 . Confident CAPTCHA
This plugin uses cloud processing by working in cooperation with your website to identify, stop, and ban spammers. The best way to flag a spammer is repeated failure of a CAPTCHA, but as humans make mistakes too, so we don’t kick off a ban from one or even 5 failures.
Hope this article was helpful for you, guys! And you’ll pick up at least one of the plugins listed.)