Universal Anti-Spam plugin for Wordpress.
https://wordpress.org/plugins/cleantalk-spam-protect/
Widgets · WordPress Plugins
Get access to data on 170,322 websites that are CleanTalk Spam Protect Customers. We know of 60,185 live websites using CleanTalk Spam Protect and an additional 110,137 sites that used CleanTalk Spam Protect historically and 36,967 websites in the United States.
Get a list of 170,322 websites using CleanTalk Spam Protect which includes location information, hosting data, contact details, 60,185 currently live websites and an additional 32,909 domains that redirect to sites in this list. 110,137 sites that used this technology previously and 36,967 websites in the United States currently using CleanTalk Spam Protect.