Akismet checks your comments against the Akismet Web service to see if they look like spam or not.
An exceptionally powerful WordPress anti-spam plugin that eliminates comment spam, trackback spam, contact form spam & registration spam.
Spam protection, anti-spam, all-in-one, premium plug-in. No comments spam & registrations spam, no email spam, protects any forms. Forget spam.
Comment spam prevention without moderation, captchas or questions
Add captcha to forms easily, comment form, login form, register form, rest password form, easy to use and translate ready, no spam comments!
Anti-spam check the robots by behavior. No captcha. Antispam let robots do so as a human can't do.
Detect and Block spam comments.
Comment Spam Prevention without CAPTCHA. No CAPTCHA, No SPAM!
Automatically delete and clean all the spam comments from your blog. Just schedule it once.
SiteBrains blocks spam posts using a completely configurable set of rules. Both interactively as the user types and on our servers upon submission.
Are you frustrated by using CAPTCHAS in comments? We provide you a good and simple solution to combat bot spam and human spam without captcha or calcu
Spam BLIP stops comment spam before it is posted, using DNS blacklists, existing comments marked as spam, and user defined lists.
Industry leading bot detection and analytics through the use of the Ellipsis Human Presence score proprietary technology.
This plugin will stop comments spam entirely, for free. It requires all users to connect their verified RubyID account before they can post a comment.