Monitoring & Error Tracking
5,421 of the 1,000,000 top sites in our Tranco top-1M census run Sentry (0.5%). An application-monitoring platform for tracking errors, exceptions, and performance issues in production. Detection is homepage-level HTML/header fingerprinting, so a site can run Sentry on other pages without it showing here.
Other monitoring & error tracking
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | mozilla.org | #89 (Tranco) | Find emails |
| 2 | sentry.io | #97 (Tranco) | Find emails |
| 3 | xiaomi.com | #144 (Tranco) | Find emails |
| 4 | nytimes.com |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| mozilla.org | #89 | Akamai Edge DNS, Bluesky, Cloudflare Bot Management + 11 more | Find emails |
| sentry.io | #97 | DigiCert, Google Cloud DNS, Nginx + 3 more | Find emails |
| xiaomi.com | #144 | Akamai edge/CDN, Akamai mPulse, DigiCert + 3 more | Find emails |
| #154 (Tranco) |
| Find emails |
| 5 | flickr.com | #172 (Tranco) | Find emails |
| nytimes.com |
| #154 |
| Amazon Route 53, DataDome, Datadog + 4 more |
| Find emails |
| flickr.com | #172 | 33Across, Adobe Fonts, Adobe Fonts (Typekit) + 41 more | Find emails |
| theguardian.com | #192 | DoubleClick (Google Ads), Fastly, Google Publisher Tag + 4 more | Find emails |
| doubleverify.com | #272 | Akamai Edge DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 12 more | Find emails |
| mozilla.com | #283 | Akamai Edge DNS, Bluesky, Fastly + 2 more | Find emails |
| mi.com | #431 | Akamai edge/CDN, Akamai mPulse, DigiCert + 7 more | Find emails |
| firefox.com | #525 | Akamai Edge DNS, Bluesky, Fastly + 2 more | Find emails |
| xiaomi.net | #587 | Akamai edge/CDN, Akamai mPulse, DigiCert + 3 more | Find emails |
| ikea.com | #593 | Astro, CSC (Digital Brand Services), Cloudflare Bot Management + 6 more | Find emails |
| independent.co.uk | #636 | Cloudflare, Fastly, Google Workspace + 5 more | Find emails |
| bandcamp.com | #740 | Fastly, Google Cloud DNS, Nginx + 1 more | Find emails |
| hotstar.com | #1,003 | Adyen, Akamai edge/CDN, Amazon Route 53 + 5 more | Find emails |
| coursera.org | #1,046 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 2 more | Find emails |
| mozilla.net | #1,159 | Akamai Edge DNS, Fastly, Let's Encrypt + 2 more | Find emails |
| fetlife.com | #1,245 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| zalando.de | #1,260 | Akamai Bot Manager, Akamai edge/CDN, Amazon Route 53 + 3 more | Find emails |
| groww.in | #1,776 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 13 more | Find emails |
| plex.tv | #2,028 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 14 more | Find emails |
| strava.com | #2,078 | Amazon CloudFront, Amazon Route 53, Ashby + 7 more | Find emails |
| themoviedb.org | #2,107 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 13 more | Find emails |
| primis.tech | #2,163 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 17 more | Find emails |
| revenuecat.com | #2,202 | 6sense, Amazon CloudFront, Amazon Route 53 + 15 more | Find emails |
From the Crawlora Website Tech Stack Dataset, a homepage-level fingerprint of a 1,000,000-domain Tranco top-1M census (run top1m-2026-08-25-full-v2), snapshot August 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →