Prevent people from registering with emails that contain a subdomain to help reduce spam.

Deter and monetize brute force attacks on your WordPress site with proof-of-work authentication. Similar to Google's reCAPTCHA at authentication. No more picking out street signs, cars, or storefronts!

Change default login site to a custom URL, block spam, bot registration, and brute-force using Google reCAPTCHA.

The Add new recaptcha google plugin allows you to implement a super security REcaptcha form into web forms.

Add a honeypot and Google reCAPTCHA V2 (noCAPTCHA CAPTCHA) to the log in form, registration form, and comment form

Adds a Google No Captcha ReCaptcha checkbox to your Wordpress and Woocommerce login, forgot password, and user registration pages.

Integrated Google ReCaptcha for WordPress.Protect the login, register, lostpassword and comment forms. Support Woocommerce, Ultimate Member and more popular forms.

Protect Login, Register, Lost & Reset Password, Comment, woocommerce, CF7, bbpress, BuddyPress forms.

Add Google's reCAPTCHA noCAPTCHA to front-end forms powered by the WP User Manager plugin.

The #1 Plugin for Blocking Form Spam on WordPress