React
JavaScript Framework
Fastly
CDNReact vs Fastly (2026): Which Is Better?
React and Fastly are both popular choices, but they serve different needs. React is a JavaScript Framework with a traditional, manual approach to building, while Fastly 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 React vs Fastly — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
Side-by-Side Comparison
| | |
|---|---|---|
| Category | JavaScript Framework | CDN |
| AI Score | 40/100 — No-Code / Visual Builder | 10/100 — Unknown |
| Detection Signals | 14 patterns | 2 patterns |
| Script Detection | 6 patterns | — |
| CDN Detection | 4 domains | — |
| Header Detection | — | 2 headers |
| Sites Detected | 1,951 scans | No data yet |
| Best For | Professional websitesTry React → | Professional websitesTry Fastly → |
| Official Website | Visit | Visit |
Example Websites
React
JavaScript Framework
React is a javascript framework with an AI Score of 40/100 (No-Code / Visual Builder). Our detection engine uses 14 signal patterns to identify React-built sites.
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.
Platform Overviews
React
React is a declarative JavaScript library developed by Meta for building interactive user interfaces, widely adopted by startups, enterprise teams, and independent developers to power everything from single-page applications to complex web platforms. AIWebsiteDetector.com identifies React-powered sites through a combination of 4 distinct script patterns, 4 CDN domains, and 3 HTML patterns — including characteristic data attributes and DOM markers that React injects during rendering. These signals are cross-referenced against known React build artifacts and CDN delivery signatures to produce reliable detections across both production-minified and development builds. Because React is a frontend library rather than a full hosting platform, it frequently appears alongside other detectable technologies such as Next.js, Vite, or Webpack, making co-detection a common and useful signal for refining confidence scores. The official React documentation and release distribution are maintained at [react.dev](https://react.dev), and its presence on a site is technology-agnostic with respect to hosting provider — meaning React is detectable regardless of whether a site runs on Vercel, Netlify, AWS, or a self-hosted server.
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.
Key Differences
- React is a JavaScript Framework while Fastly is a CDN — they serve different primary use cases and aren't always direct alternatives.
- React scores higher on AI involvement (40/100 vs 10/100 for Fastly), meaning it relies more heavily on AI for site generation and content creation.
- Our detection engine identifies React using 14 fingerprint patterns and Fastly using 2 patterns — more signals generally means more reliable detection.
Which Should You Choose?
Choose React if…
- You prefer a javascript framework solution
- You want more manual control over the final output
- React's detection fingerprint of 14 signals means your site is reliably identifiable
Choose Fastly if…
- You need a cdn approach
- You prefer traditional building tools with predictable output
- Fastly's ecosystem and community better match your team's existing workflow
Our Pick — Based on 1,951+ detections
React
The most frequently detected javascript framework in our scan database.
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