Cloudflare, a hidden pillar of the internet

Its name may not be very well known, but it is one of the most important companies on the global internet. Cloudflare experienced a major outage on Tuesday, November 18, resulting in connection issues for millions of websites worldwide. Cloudflare is a reverse proxy service, an intermediary between clients and servers that enhances security, performance and reliability for web applications. The outage, which has since been resolved, made major websites, including social network X, Amazon, Claude AI, Canva, and Spotify, inaccessible for several hours.

As our infographic shows, Cloudflare is a hidden pillar of the internet: in November 2025, it protected around 20 percent of all websites worldwide, according to data from W3Techs, far ahead of its main competitor in the market, Amazon CloudFront, which protected between 1 and 2 percent.