Nearly 90% of European Companies Using CDNs Rely on Cloudflare, CipherCue Finds

Content delivery networks (CDNs) act as intermediaries between users and websites, handling tasks such as caching content, terminating TLS connections, and filtering traffic. When a CDN experiences an outage, all websites relying on it can be affected simultaneously, regardless of their individual operations. CipherCue analyzed 44,143 European companies that use CDNs and found that 89.6% of them rely on Cloudflare as their CDN provider. This figure is slightly higher than the 84.1% share reported by W3Techs globally. The analysis only includes companies actively using a CDN, excluding those serving content directly from their own servers. Other CDN providers hold significantly smaller shares: Amazon CloudFront is second with 3,112 companies, though some detections may reflect AWS hosting rather than deliberate CDN use. Fastly, a pure CDN provider, ranks third with 1,299 companies, and Akamai, one of the oldest CDN vendors, is fourth with 396 companies. Cloudflare leads in all surveyed European countries, with its market share ranging from about 80% in Spain and Ireland to nearly 95% in the Netherlands. The United Kingdom has the highest absolute number of Cloudflare users at 15,846, while Germany has the lowest share among major markets at 81.4%. This high concentration poses potential risks. One reason companies use CDNs is to improve resilience, but when most companies depend on a single provider, an outage can have widespread impact. Cloudflare has experienced several notable incidents in the past 18 months, including a database permissions error in November 2025, a configuration issue in December 2025, and a routing mishap in February 2026. None were caused by cyberattacks but resulted from internal errors that affected many customers simultaneously. The issue is not unique to Cloudflare; other CDN providers also face bugs. However, because fewer sites rely on them, their outages tend to be more contained. The concentration of CDN usage means that a single provider's problem can disrupt a large portion of the market at once. It is important to note that the CDN is only the front door to a website. Data storage and processing typically occur behind the CDN on origin servers, which may be hosted by different providers. For data residency and compliance concerns, the origin infrastructure is more relevant than the CDN. Companies and IT professionals can check which CDN fronts a website by inspecting HTTP response headers. For example, headers such as "cf-ray" or "server: cloudflare" indicate Cloudflare, while "x-served-by" suggests Fastly, and "x-amz-cf-id" points to Amazon CloudFront. CipherCue's findings highlight the dominance of Cloudflare among European CDN users, especially small and mid-sized companies where Cloudflare's free tier is popular. This concentration underscores the importance of considering the resilience and risks associated with relying heavily on a single CDN provider.