CloudFlare - Cloudflare is a global network designed to make everything you connect to the Internet secure, private, fast, and reliable.
AWS Shield - AWS Shield is a managed Distributed Denial of Service (DDoS) protection service that safeguards web applications running on AWS.
NakedSSL - Hassle-free SSL clothes for your naked domains.
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.
Secure My Website - A pain-free service to add SSL to your site, for non-geeks
DataDome - DataDome provides innovative technology and human expertise to block bad bots.