CloudFlare - Cloudflare is a global network designed to make everything you connect to the Internet secure, private, fast, and reliable.
DDoS-GUARD - DDoS protection for websites and networks. CDN included.
Myra Security - The Myra Security-as-a-Service platform monitors, analyzes, and filters malicious internet traffic before virtual attacks can do any real harm.
Sucuri - Website Protection, Malware Removal, and Blacklist Prevention
KeyCDN - KeyCDN is a high-performance Content Delivery Network (CDN). Lowest price globally at $0.04/GB with HTTP/2 Support and free Origin Shield.
BunkerWeb - BunkerWeb is a next-generation and open-source Web Application Firewall (WAF).