Please be aware that not all comments come in the front door, you may need other comment blockers as well.
Searching the plugins for “comment captcha” gave lots to results, the first two are:
WordPress › SI CAPTCHA Anti-Spam « WordPress Plugins
May 16, 2014 … Adds CAPTCHA anti-spam methods to WordPress forms for comments, registration, lost password, login, or all. In order to post comments or …
https://wordpress.org/plugins/si-captcha-for-wordpress/
WordPress › Captcha « WordPress Plugins
This captcha can be used for login, registration, password recovery, comments forms. There is also a premium version of the plugin, allowing compatibility with …
http://wordpress.org/plugins/captcha/
(@d-levine)
9 years, 8 months ago
I’m getting a lot of spam comments that are being caught as spam but take up a lot of space until I can delete them permanently. How do I put a capcha on comments so that there will be less of them?
Here is an example of my articles: http://www.americandiversityreport.com/footprints-in-paris-by-poonam-a-chawla/