Inserts Google’s new reCAPTCHA into Infusionsoft web forms
A lightweight plugin to protect email addresses from email-harvesting robots by encoding them into decimal and hexadecimal entities.
Protect your site against bad bots by trapping them in a virtual blackhole.
The most lightweight Google reCAPTCHA v2 comment anti-spam plugin!
Block SPAM without any type of CAPTCHA - plugin add "HoneyTrap" (and a few other tricks) for comment form to block SPAMbots.
Shortcode for simple email address obfuscation using CSS.
PlusCaptcha - The Easiest Captcha to Setup and Execute, with an Auto-Setup Feature! Trusted by thousands of blog, e-commerce, and government sites!
No spam in comments. No captcha.
WordPress SuperSonic with CloudFlare
Comment Spam Prevention without CAPTCHA. No CAPTCHA, No SPAM!
Stop spam bots from registering, logging in, filling out contact forms and commenting on your site without using annoying Captcha codes or puzzles.
This Plugin provides a Shortcode to encrypt email addresses / links and protect them against spam.
Contact Form 7 Honeypot - Adds honeypot anti-spam functionality to CF7 forms.
NF Captcha adds Really Simple CAPTCHA element for human check.
antispam question for signup and comment forms of wordpress, set by admin, supports Multisite mode
Spam Master is the Ultimate Spam Protection plugin that blocks new user registrations and post comments with Real Time anti-spam lists.
This plugin utilizes Google reCAPTCHA to help your blog stay clear of spams. BWP reCAPTCHA supports no CAPTCHA reCAPTCHA, Contact Form 7 and Akismet.
Prevents automated SPAM by requiring visitors to answer a question of your choosing (plaintext or regex).
Block unwanted visitors from viewing your WordPress site.
Powerful anti-spam plugin that eliminates blog comment spam. Finally, you can enjoy a spam-free WordPress blog! Includes contact form.
Bad Behavior prevents spammers from ever delivering their junk, and in many cases, from ever reading your site in the first place.
If you see referral spam in your analytics and would like to block it, this plugin is for you.
Math Captcha is a 100% effective CAPTCHA for WordPress that integrates into login, registration, comments, Contact Form 7 and bbPress.
Encode mailto links, email addresses, phone numbers and any text to hide them from (spam)bots. Mailto links will be protected automatically.
Todd Lahman's comment spam blocking plugin that blocks automated spam with zero false positives.
“…another popular solution to fight spam is Antispam Bee”—Matt Mullenweg, Q&A WordCamp Europe 2014
Zero Spam makes blocking spam comments and registrations easy.
Integrates NLPCaptcha anti-spam methods with WordPress including comment, registration, and email spam protection.
CAPTCHA with the sophistication of video advertising that protects your website from spam. Make money as we take human verification to the next level.