AWS WAF - AWS WAF is a web application firewall that helps protect your web applications from common web exploits.
CloudFlare - Cloudflare is a global network designed to make everything you connect to the Internet secure, private, fast, and reliable.
ModSecurity - ModSecurity is an Open Source web application firewall developed by Trustwave's SpiderLabs.
Amazon CloudFront - Amazon CloudFront is a content delivery web service.
Imperva Cloud Application Security - Deploy your applications and data where you want. When you want. Imperva keeps them secure in the cloud, on premises, and in hybrid clouds.
CDN77 - Content Delivery Network - website speed acceleration with CDN77. 28+ PoPs, Pay-as-you-go prices, no commitments.