Easy and extremely productive spam-fighting plugin with many sophisticated solutions. Includes protection against trackback spam and privacy hints.
All-in-one WordPress spam protection, with NO CAPTCHAs, challenge questions or other inconvenience to site visitors.
Spam protection, anti-spam, all-in-one, premium plug-in. No comments spam & users spam, no contact form & WooCommerce spam. Forget spam.
Aggressive anti-spam plugin that eliminates comment spam, trackback spam, contact form spam and registration spam. Protects against malicious attacks.
The plugin adds a No CAPTCHA reCAPTCHA tag in Contact Form 7, which can be used to include a No CAPTCHA reCAPTCHA anti-spam field.
A Clean, no hassle contact form plugin for WordPress, with advanced Spam bot protection that doesn't require Captcha.
Comment spam prevention without moderation, captchas or questions
WordPress plugin to fight with 500+ referrer spammers (like semalt, buttons-for-website and many more).
Block 250+ spam sites, such as semalt.com and 4webmasters.org! Keep your website safe and your Google Analytics statistics clean and accurate.
Best CAPTCHA solution, prevent spams, you can customized CAPTCHA challenge text and have people type Captcha it, better Captcha experience.
The best captcha alternative. Accessible, Mobile-friendly, and Retina-ready!
Unspam makes it harder for spammers to automatedly send spam to your blog by changing the names of the fields in the comment forms.
SiteBrains blocks spam posts using a completely configurable set of rules. Both interactively as the user types and on our servers upon submission.
Check comment against the SpamBot Search Tool using the IP address, the email and the name of the poster as search criteria.
Tolero wordpress blog spam filter checks the submiter's bahavior. To operate properly it should have a physical access to the apache log file.
Prevent people from registering with emails that contain a subdomain to help reduce spam.
WP Spam IP is a simple and effective WordPress plugin that adds known Spam IP adresses to your Settings -> Discussion -> Comment Blacklist.
Show spam statistics on your blog. (Now merged into SpamTask)