What Is Cloudflare?
hostingCloudflare is a global network platform that provides CDN, DNS, DDoS protection, and edge computing services to over 20% of the internet. Cloudflare Pages extends this with a JAMstack hosting platform, while Cloudflare Workers enables serverless code execution at the edge.
Detect Cloudflare on any website:
Why Cloudflare Matters
Hosting choices affect latency, TLS behaviour, edge caching, log availability, and compliance posture. Whether you're benchmarking Cloudflare against a competitor's infra, diagnosing a latency problem, or documenting third-party providers for a security review, detecting Cloudflare from response headers and CDN markers is faster than asking anyone. We've fingerprinted Cloudflare on 30 live sites in our database, so the answers here are grounded in real scan data — not marketing copy.
How Websites Using Cloudflare Work
- Anycast CDN with 300+ data centres for ultra-low latency delivery
- Automatic DDoS mitigation and WAF protection
- DNS service with one of the fastest resolution times globally
- Cloudflare Workers: V8 isolate-based serverless edge computing
- Cloudflare Pages for static site and full-stack app deployment
- Zero Trust network security and access control
Best Practices When Working With Cloudflare
Based on patterns in our scan dataset and the detection evidence tiers.
- →Start by running a Cloudflare detection scan on any URL you're evaluating — the 80+ signal engine returns a confidence score plus the exact markers it matched, which beats reading view-source by hand.
- →Cross-check the result against the full detection evidence in /how-scores-work — confidence tiers tell you whether a match is strong (headers + scripts) or circumstantial (a single HTML pattern).
- →When the hosting signal is Cloudflare, check the companion framework and CDN detections — hosting choices strongly bias which frameworks teams end up running.
How we detect Cloudflare — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How Our Detector Identifies Cloudflare
Our scanner analyzes multiple layers of a website's technical fingerprint to detect Cloudflare usage.
- CF-Ray HTTP response header (unique Cloudflare request identifier)
- server: cloudflare HTTP header
- Hosting provider or CDN identified as Cloudflare
- Technology entries referencing Cloudflare services
- cf-cache-status response header from Cloudflare's edge cache
Websites Built With Cloudflare
Real sites detected by our scanner
shopify.com4/24/2026Frequently Asked Questions About Cloudflare
What is Cloudflare?+
Cloudflare is a global network platform that provides CDN, DNS, DDoS protection, and edge computing services to over 20% of the internet. Cloudflare Pages extends this with a JAMstack hosting platform, while Cloudflare Workers enables serverless code execution at the edge.
Why does Cloudflare matter?+
Hosting choices affect latency, TLS behaviour, edge caching, log availability, and compliance posture. Whether you're benchmarking Cloudflare against a competitor's infra, diagnosing a latency problem, or documenting third-party providers for a security review, detecting Cloudflare from response headers and CDN markers is faster than asking anyone. We've fingerprinted Cloudflare on 30 live sites in our database, so the answers here are grounded in real scan data — not marketing copy.
How do we detect Cloudflare?+
Our scanner checks for these signals: CF-Ray HTTP response header (unique Cloudflare request identifier); server: cloudflare HTTP header; Hosting provider or CDN identified as Cloudflare; Technology entries referencing Cloudflare services; cf-cache-status response header from Cloudflare's edge cache. Each match contributes to a confidence score, and the full evidence tiers are documented at /how-scores-work.
How many websites using Cloudflare are in the database?+
We've fingerprinted 30+ live sites built with Cloudflare across our scan dataset. The list refreshes as new scans come in.
What are the typical characteristics of a Cloudflare website?+
Anycast CDN with 300+ data centres for ultra-low latency delivery. Automatic DDoS mitigation and WAF protection. DNS service with one of the fastest resolution times globally. Cloudflare Workers: V8 isolate-based serverless edge computing. Cloudflare Pages for static site and full-stack app deployment. Zero Trust network security and access control
Related Tools & Technologies
Other hosting and deployment we detect
Ready to put Cloudflare detection to work?
You now know what Cloudflare is, why it matters, how to spot it, and where the detection signals come from. The next step is using that knowledge on a real URL — yours, a competitor's, or a prospect's.