What Is Fastly?
Website Builder
www.fastly.comFastly is a cdn platform used to build and deploy modern websites.
Detect Fastly on any website:
Why Fastly Matters
If you're weighing Fastly for a new site, auditing a competitor's stack, or figuring out why a prospect's website looks the way it does, the platform choice drives everything downstream: hosting cost, SEO control, performance ceiling, and migration pain later. We've fingerprinted Fastly on 30 live sites in our database, so the answers here are grounded in real scan data — not marketing copy.
How Websites Using Fastly Work
- Recognizable runtime and asset loading patterns
- Consistent layout or component conventions across projects
- Platform-specific deployment and publishing workflow
Best Practices When Working With Fastly
Based on patterns in our scan dataset and the detection evidence tiers.
- →Start by running a Fastly 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).
- →Pair this page with the builder gallery (/gallery/fastly) to see how Fastly sites look in the wild and spot the design patterns that repeat across real deployments.
- →For migration planning, compare Fastly against other builders in the same category — feature parity usually matters more than raw popularity.
How we detect Fastly — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How Our Detector Identifies Fastly
Our scanner analyzes multiple layers of a website's technical fingerprint to detect Fastly usage.
- 0 script-based fingerprints
- 0 CDN/domain fingerprints
- 0 HTML structure fingerprints
Websites Built With Fastly
Real sites detected by our scanner
Frequently Asked Questions About Fastly
What is Fastly?+
Fastly is a cdn platform used to build and deploy modern websites.
Why does Fastly matter?+
If you're weighing Fastly for a new site, auditing a competitor's stack, or figuring out why a prospect's website looks the way it does, the platform choice drives everything downstream: hosting cost, SEO control, performance ceiling, and migration pain later. We've fingerprinted Fastly on 30 live sites in our database, so the answers here are grounded in real scan data — not marketing copy.
How do we detect Fastly?+
Our scanner checks for these signals: 0 script-based fingerprints; 0 CDN/domain fingerprints; 0 HTML structure fingerprints. Each match contributes to a confidence score, and the full evidence tiers are documented at /how-scores-work.
How many websites using Fastly are in the database?+
We've fingerprinted 30+ live sites built with Fastly across our scan dataset. The list refreshes as new scans come in.
What are the typical characteristics of a Fastly website?+
Recognizable runtime and asset loading patterns. Consistent layout or component conventions across projects. Platform-specific deployment and publishing workflow
Related Tools & Technologies
Other website builders and platforms we detect
Ready to put Fastly detection to work?
You now know what Fastly 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.