No CAPTCHA reCAPTCHA simply adds the no CAPTCHA reCAPTCHA by Google to your WordPress site once you install the plugin.
This plugin lets you add the Captcha in your Contact Form 7 forms easily. You can even customize the theme for your Captcha. Further, the plugin also auto-detects the language and translates the captcha to the language used by the user.
You can add the captcha in the login, registration, and comment forms only with this plugin.