Fastly
CDN
AWS CloudFront
CDNFastly vs AWS CloudFront (2026): Which Is Better?
Fastly and AWS CloudFront are both popular choices, but they serve different needs. Fastly is a CDN with a traditional, manual approach to building, while AWS CloudFront is a CDN that prioritises developer or designer control.
Below you'll find a side-by-side breakdown of detection signals, AI scores, and technical fingerprints — plus our honest take on which builder wins for different use cases.
How we detect Fastly vs AWS CloudFront — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
Side-by-Side Comparison
| | |
|---|---|---|
| Category | CDN | CDN |
| AI Score | 10/100 — Unknown | 10/100 — Unknown |
| Detection Signals | 2 patterns | 2 patterns |
| Script Detection | — | — |
| CDN Detection | — | — |
| Header Detection | 2 headers | 2 headers |
| Sites Detected | No data yet | No data yet |
| Best For | Professional websitesTry Fastly → | Professional websitesTry AWS CloudFront → |
| Official Website | Visit | Visit |
Example Websites
Fastly
CDN
Fastly is a cdn with an AI Score of 10/100 (Unknown). Our detection engine uses 2 signal patterns to identify Fastly-built sites.
AWS CloudFront
CDN
AWS CloudFront is a cdn with an AI Score of 10/100 (Unknown). Our detection engine uses 2 signal patterns to identify AWS CloudFront-built sites.
Platform Overviews
Fastly
Fastly is a high-performance edge cloud platform and content delivery network used primarily by enterprises, media companies, and high-traffic web applications that require low-latency content delivery, real-time streaming, and programmable infrastructure at scale. The platform is widely adopted by technology companies, news publishers, and e-commerce operators that demand granular control over caching and request routing at the network edge. AIWebsiteDetector.com identifies Fastly deployments by analyzing 2 distinct HTTP response headers that Fastly injects into served traffic, providing reliable, server-side signals that remain consistent across the wide variety of site types and configurations built on the platform. These header-based signals make Fastly particularly straightforward to detect programmatically, as they appear regardless of front-end framework or CMS in use, meaning the underlying CDN layer is exposed even when the application stack is otherwise obscured. Fastly operates on a usage-based pricing model with no upfront commitments, positioning it as a premium infrastructure choice that distinguishes it from shared or budget hosting environments — a characteristic that often correlates with high-traffic, performance-critical deployments in detection results.
AWS CloudFront
AWS CloudFront is Amazon Web Services' globally distributed content delivery network, widely used by enterprises, SaaS platforms, and high-traffic web applications to accelerate static and dynamic content delivery through AWS's edge location infrastructure. The AIWebsiteDetector detection engine identifies CloudFront-powered sites through two distinct HTTP response headers that Amazon injects at the edge layer, providing reliable, low-ambiguity signals that persist regardless of how the origin server is configured. These headers are characteristic to CloudFront's request routing and caching architecture, making them consistently present across the broad range of deployments — from simple S3-hosted static sites to complex multi-origin distributions fronting EC2 or Lambda backends. Because CloudFront operates as a transparent proxy layer rather than modifying page markup or injecting client-side scripts, header-based detection is the technically appropriate method and yields high-confidence results without reliance on DOM patterns or JavaScript fingerprinting. CloudFront is a paid AWS service billed on data transfer and request volume, though it integrates tightly with other AWS services and is commonly provisioned alongside Route 53, S3, and API Gateway — making its presence a strong indicator of a broader AWS-hosted infrastructure stack.
Key Differences
- Both Fastly and AWS CloudFront are classified as CDN tools, making them the most direct competitors in this comparison.
- Fastly scores higher on AI involvement (10/100 vs 10/100 for AWS CloudFront), meaning it relies more heavily on AI for site generation and content creation.
- Our detection engine identifies Fastly using 2 fingerprint patterns and AWS CloudFront using 2 patterns — more signals generally means more reliable detection.
Which Should You Choose?
Choose Fastly if…
- You prefer a cdn solution
- You want more manual control over the final output
- Fastly's detection fingerprint of 2 signals means your site is reliably identifiable
Choose AWS CloudFront if…
- You need a cdn approach
- You prefer traditional building tools with predictable output
- AWS CloudFront's ecosystem and community better match your team's existing workflow
Our Pick — Based on our detections
Fastly
The most frequently detected cdn in our scan database.
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