The Google Captcha (reCAPTCHA) plugin is one way to boost site security and reduce spam. It adds a very simple to use reCAPTCHA checkbox to all forms (or some forms as you see fit). Installation and setup is very easy, and the options are straight-forward. I especially like that you can add this feature to the login page and the comments forms. Plus, you can exclude logged in users by role – even custom roles!
The premium options you can buy into are nice to have, but are not necessary to make the plug-in work like a champ on basic sites.
You can get the plugin on WordPress.org to install manually or search “Google reCAPTCHA” through your WordPress [Add New] plugin screen. The plugin is by BestWebSoft.
So, I’m not overly fond of the latest update. It includes an updated menu (BWS Panel) that is moved to the top complete with an over-large icon that messes up the flow of the admin menu. The “improved” menu screen would probably be great if I subscribed to their services and used other plugins, but I just want the one free-version for now. I don’t appreciate this particular type of in-your-face up-selling. If you don’t mind all of the extra baggage and/or you intend to “go pro,” then this is still a great plugin to use. As of today, pro membership (access to all their plugins) is $40/month and $17.95/year for the one plugin.
A great-so-far alternative is the GNA Google reCAPTCHA.