What are some alternatives?
When comparing ControlScan and Imperva Cloud Application Security, you can also consider the following products
Linkbynet - Linkbynet Managed Services provides cloud computing expertise, high-security business hosting, IT performance management, etc.
Amazon CloudFront - Amazon CloudFront is a content delivery web service.
MobilityGuard - MobilityGuard delivers a full suite of innovative technical security products and services.
Sucuri - Website Protection, Malware Removal, and Blacklist Prevention
WiscNet Security Services - WiscNet Security Services provide a managed firewall and understands the importance of network security.
CloudFlare - CloudFlare can be used by anyone with a website and their own domain, regardless of your choice in platform