AI Website Detector
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AI Website Detector
BuildersCompareGalleryTrendsInsightsRecent ScansDetect a Site
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AI App Builder

Is This Website Built With Builder.io?

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Builder.io is a visual development platform and AI-powered app builder that enables developers and marketing teams to create, manage, and publish web experiences through a drag-and-drop interface backed by a headless CMS architecture. Sites built with Builder.io are identifiable through a combination of technical fingerprints, including 2 distinct script patterns tied to Builder's SDK and content rendering engine, 2 characteristic HTML patterns embedded in the page markup, 1 CDN domain used to serve Builder-hosted assets, and 1 meta tag pattern that signals Builder.io-managed content. These signals work in concert to give AIWebsiteDetector.com's engine a high-confidence identification, as Builder.io's integration style leaves consistent, recognizable traces across the DOM regardless of the underlying frontend framework — whether React, Next.js, or plain HTML. Builder.io operates as a SaaS platform with tiered pricing, from a free plan for small projects up to enterprise contracts, meaning its detection signature appears across a wide spectrum of site types, from marketing landing pages to full-scale e-commerce storefronts. One characteristic that makes Builder.io particularly distinctive to detect is its reliance on a dedicated CDN domain for content delivery, which remains consistent even when the visual components are deeply embedded within third-party frameworks, providing a reliable anchor for automated detection.

Detect Builder.io Websites — Free Tool

Enter any URL to check if it was built with Builder.io. Instant results, no account required.

How we detect Builder.io — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.

How to Detect Builder.io Websites

Script Patterns

2 patterns

CDN Domains

1 patterns

HTML Patterns

2 patterns

Meta Tags

1 patterns

1. Check the Page Source

Open the website in your browser, right-click, and select "View Page Source". Search for builder.io-specific patterns in the HTML.

2. Look for Script Files

Check the Network tab in DevTools for JavaScript files loaded from Builder.io domains.

builder\.io
cdn\.builder\.io

3. Check CDN Domains

Network requests to these CDN domains indicate a Builder.io site:

cdn\.builder\.io

4. Use AI Website Detector (Easiest)

Our automated scanner checks all these signals at once and gives you an instant confidence score. Just enter any URL above.

Frequently Asked Questions

Is this website built with Builder.io?

You can detect if any website was built with Builder.io by using our free scanner above. Just enter the URL and we'll analyze HTML patterns, JavaScript files, CDN domains, and HTTP headers to determine if Builder.io was used — with a confidence score.

How to detect if a website was built with Builder.io?

There are several ways to detect Builder.io: (1) View the page source and look for Builder.io-specific class names or script URLs, (2) Check the Network tab in DevTools for requests to Builder.io CDN domains, (3) Use our free tool — we check 5 detection signals automatically.

What websites are built with Builder.io?

Builder.io is used by thousands of websites worldwide. Our scanner has detected many Builder.io-built sites across different industries. You can scan any URL to check if it uses Builder.io.

How accurate is the Builder.io detection?

Our Builder.io detection engine checks 5 unique fingerprint signals, achieving high confidence results. We score each match and return a confidence percentage so you know how certain the detection is.

About Builder.io

Builder.io is a leading ai app builder used by thousands of businesses and developers worldwide. Our detection engine can identify Builder.io-built websites with high confidence by analyzing multiple technical signals.

Whether you're a developer doing competitive research, a designer looking for inspiration, or just curious about how a website was built — AI Website Detector gives you instant, accurate detection.

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Detection Info

Category
AI App Builder
Signals Used
5 patterns
Accuracy
High

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