Adds Secure Image CAPTCHA anti-spam to WordPress
https://wordpress.org/plugins/si-captcha-for-wordpress/
Widgets · CAPTCHA · WordPress Plugins
Get access to data on 184,112 websites that are SI CAPTCHA Customers. We know of 36,379 live websites using SI CAPTCHA and an additional 147,733 sites that used SI CAPTCHA historically and 10,329 websites in the United States.
Get a list of 184,112 websites using SI CAPTCHA which includes location information, hosting data, contact details, 36,379 currently live websites and an additional 18,185 domains that redirect to sites in this list. 147,733 sites that used this technology previouslyand 10,329 websites in the United States currently using SI CAPTCHA.
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