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 186,873 websites that are SI CAPTCHA Customers. We know of 27,044 live websites using SI CAPTCHA and an additional 159,829 sites that used SI CAPTCHA historically and 7,651 websites in the United States.
Get a list of 186,873 websites using SI CAPTCHA which includes location information, hosting data, contact details, 27,044 currently live websites and an additional 16,534 domains that redirect to sites in this list. 159,829 sites that used this technology previouslyand 7,651 websites in the United States currently using SI CAPTCHA.
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