Cloudflare, Inc., is an American company that provides content delivery network services, cybersecurity, DDoS mitigation, wide area network services, reverse proxies, Domain Name Service, ICANN-accredited domain registration, and other services. Cloudflare's headquarters are in San Francisco, California. According to W3Techs, Cloudflare is used by around 19.3% of all websites on the Internet for its web security services, as of January 2025.