Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Rubicon Project is an advertising automation platform enabling publishers to transact advertising brands.
Sovrn is a advertising products and services provider for publishers.
SpotX is a video advertising platform.