Wikipedia
CloudFlare
CloudFlare, Inc. is a U.S. company that provides a content delivery network, Internet Security services and distributed domain name server services, sitting between the visitor and the CloudFlare user's hosting provider, acting as a reverse proxy for websites. Its network protects, speeds up, and improves availability for a website or mobile application with a change in DNS. CloudFlare is headquartered in San Francisco, California, with additional offices in London, Singapore, Champaign and Austin.