WordPress spambots plugins

If your Blog allows new subscribers to register via the registration option at the Login page, this plugin may be useful to you. It includes a reCaptcha block to the register form, so you get rid of spambots. To use it you have to sign up for (free) public and private keys at <a href="https://www.google.com/recaptcha/admin#createsite" target="_blank">reCAPTCHA API Signup Page</a>. Version 3 added extra security by querying antispam databases for known ip and email of spammers, so you get rid of them even if they break the reCaptcha challenge by solving it as real persons.

Block SPAM without any type of CAPTCHA - plugin add "HoneyTrap" (and a few other tricks) for comment form to block SPAMbots.

This plugin validates email in realtime using live connections and aggregated data, by leveraging the ThreatPoint email verification API service.