CipherCue measured CDNs for 44,143 tracked European companies and found 89.6% of those using a CDN sit behind Cloudflare (country shares range ~79%–95.6%), highlighting high market concentration and the systemic outage risk when a single front-door provider has incidents. The analysis is based on HTTP/DNS fingerprinting of a cohort skewed to small/mid companies, detects CDNs via response headers (with caveats such as CloudFront/AWS ambiguity), and is not a representative sample of all firms.