Advanced Google reCAPTCHA vs Hiddy captcha 1.5.1

Advanced Google reCAPTCHA protects your WordPress site from spam comments & brute force login attacks using captcha. This captcha plugin, quickly adds Google reCAPTCHA and other captcha tests to WordPress comment form, login form, and other forms. Using Advanced Google reCAPTCHA (most popular captcha on the market), you’ll be safe from spam comments and protect user accounts, WooCommerce, Easy Digital Downloads, BuddyPress and other forms from brute-force login attacks. reCaptcha works for: Login Form Registration Form Reset Password Form Comment Form BuddyPress Form WooCommerce Form Easy Digital Downloads (EDD) Login Form Easy Digital Downloads (EDD) Registration Form Captcha uses these 3rd party libs: Chart.js, 2017 Nick Downie, MIT DataTables, 2008-2017 SpryMedia Ltd, MIT moment.js, Tim Wood, Iskren Chernev, MIT SweetAlert 2, github.com/Sweetalert2/Sweetalert2, MIT tooltipster, www.heteroclito.fr/modules/tooltipster/, MIT

This plugin provides you an easy captcha without javascript, without images, without math. Only a few of CSS and a few of server side. An hidden text input is placed in comment form a human cannot see it so a human cannot compile it, a spambot otherwise see the text input and is forced to compile it. The plugin check the existence of this text input and check if it has a value or not. It drops all comment with a value in the text input as spam. Really simple and powerfull antispam system. Low CPU usage and no access to DB.