Sentry is the most widely adopted error-tracking and performance-monitoring platform for developers, capturing exceptions, stack traces, and performance data across front-end and back-end code — used by teams of virtually every size, from solo developers to large enterprises, largely because of its strong free tier and framework integrations. Our engine detects Sentry through 2 script patterns, 2 HTML patterns, and 1 CDN domain tied to its client SDK's error-capture initialization and asset delivery. Documented at sentry.io.
Detect Sentry Websites — Free Tool
Enter any URL to check if it was built with Sentry. Instant results, no account required.
How we detect Sentry — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How to Detect Sentry Websites
Script Patterns
2 patterns
CDN Domains
1 patterns
HTML Patterns
2 patterns
1. Check the Page Source
Open the website in your browser, right-click, and select "View Page Source". Search for sentry-specific patterns in the HTML.
2. Look for Script Files
Check the Network tab in DevTools for JavaScript files loaded from Sentry domains.
3. Check CDN Domains
Network requests to these CDN domains indicate a Sentry site:
sentry-cdn\.com4. 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 Sentry?
You can detect if any website was built with Sentry 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 Sentry was used — with a confidence score.
How to detect if a website was built with Sentry?
There are several ways to detect Sentry: (1) View the page source and look for Sentry-specific class names or script URLs, (2) Check the Network tab in DevTools for requests to Sentry CDN domains, (3) Use our free tool — we check 5 detection signals automatically.
What websites are built with Sentry?
Sentry is used by thousands of websites worldwide. Our scanner has detected many Sentry-built sites across different industries. You can scan any URL to check if it uses Sentry.
How accurate is the Sentry detection?
Our Sentry 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.
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Detection Info
- Category
- Monitoring
- Signals Used
- 5 patterns
- Accuracy
- High
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