Invisible reCaptcha is a WordPress plugin by MihChe which integrates the new Invisible reCaptcha by Google with your WordPress site.
Features:
Login form protection – annihilates Brute Force attacks
Registration form protection
Comments form protection
Forgot Password form protection
WooCommerce Invisible reCaptcha
Login form protection
Registration form protection
Product Review form protection
Lost Password form protection
Reset Password form protection
Contact Form 7 Invisible reCaptcha
Download: https://wordpress.org/plugins/invisible-recaptcha/
More info: https://www.google.com/recaptcha/intro/index.html