Ce service a une option gratis et des offres pro qui sont très intéressantes pour les gros sites. Je ne mets pas de liens, mais avec le nom vous trouverez facilement.
Intercept requests determined to be threats and present them with a challenge page. Add cookies to your domain to track visitors, such as those who have successfully passed the CAPTCHA on a challenge page. Add script to your pages to, for example, add services, Apps, or perform additional performance tracking. Other changes to increase performance or security of your website.
