We are using Cleantalk and would just like to boast a little.
So far it is doing precisely what it should do.
What is Cleantalk ?
CleanTalk is a SaaS spam protection service for websites. CleanTalk uses protection methods which are invisible to site visitors. Connecting to the service eliminates needs for CAPTCHA, questions and answers, and other methods of protection that complicate the exchange of information on the site.
CleanTalk cloud service provides automatic and invisible protection against spam for websites. CleanTalk analyzes user behavior and evaluates the parameters of a completed form.
The CleanTalk company developed unique algorithms to assess the behavior of visitors, and with 100% accuracy they keep spam messages at bay.
Keep up the Good Work Cleantalk !