CAPTCHA for WordPress that integrates into login, registration and comments.
https://wordpress.org/plugins/wp-math-captcha/
Widgets · CAPTCHA · WordPress Plugins
Get access to data on 39,600 websites that are Math Captcha Customers. We know of 9,229 live websites using Math Captcha and an additional 30,371 sites that used Math Captcha historically and 2,925 websites in the United States.
Get a list of 39,600 websites using Math Captcha which includes location information, hosting data, contact details, 9,229 currently live websites and an additional 6,971 domains that redirect to sites in this list. 30,371 sites that used this technology previouslyand 2,925 websites in the United States currently using Math Captcha.
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