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 |
|---|---|---|---|
| guardian.co.uk | #2,366 | DoubleClick (Google Ads), Fastly, Google Publisher Tag + 4 more | Find emails |
| hbomax.com | #2,399 | Akamai edge/CDN, Amazon Route 53, Google Tag Manager + 3 more | Find emails |
| smithsonianmag.com | #2,538 | Amazon Route 53, Cloudflare Web Analytics, Cloudflare edge/CDN + 9 more | Find emails |
| #154 (Tranco) |
| Find emails |
| 5 | flickr.com | #172 (Tranco) | Find emails |
| sketchfab.com | #2,557 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| max.com | #2,790 | Akamai edge/CDN, Amazon Route 53, Google Tag Manager + 3 more | Find emails |
| pypi.org | #2,817 | Amazon Route 53, Amazon S3, Atlassian Statuspage + 8 more | Find emails |
| softonic.com | #3,013 | ConsentMo, Didomi, Google Cloud DNS + 4 more | Find emails |
| loom.com | #3,083 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 15 more | Find emails |
| global-e.com | #3,694 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 21 more | Find emails |
| ably.io | #3,764 | Amazon Route 53, Cloudflare edge/CDN, Gatsby + 11 more | Find emails |
| familysearch.org | #3,832 | Amazon CloudFront, Amazon Route 53, DigiCert + 3 more | Find emails |
| nos.nl | #3,901 | Amazon CloudFront, Amazon Route 53, Microsoft 365 + 6 more | Find emails |
| razorpay.com | #3,910 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| runescape.com | #3,944 | Adobe Fonts, Adobe Fonts (Typekit), Amazon Advertising + 24 more | Find emails |
| apnic.net | #3,967 | Adyen, Brightcove, Cloudflare Bot Management + 26 more | Find emails |
| thenextweb.com | #4,219 | Calendly, Cloudflare, Cloudflare edge/CDN + 7 more | Find emails |
| buffer.com | #4,265 | Cloudflare, Cloudflare edge/CDN, CookieYes + 9 more | Find emails |
| nrk.no | #4,278 | Akamai Edge DNS, Akamai mPulse, Cloudflare edge/CDN + 5 more | Find emails |
| veeam.com | #4,369 | Adobe Experience Cloud (Launch), Amazon (ACM), Amazon Route 53 + 7 more | Find emails |
| foreignpolicy.com | #4,406 | Cloudflare, Cloudflare edge/CDN, Google Hosted Libraries + 6 more | Find emails |
| adweek.com | #4,459 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 10 more | Find emails |
| packagist.org | #4,493 | Bunny CDN, BunnyCDN, Google Fonts + 7 more | Find emails |
| hashicorp.com | #4,541 | Amazon CloudFront, Amazon Route 53, Amazon S3 + 12 more | Find emails |
| uchi.ru | #4,702 | Google Tag Manager, Let's Encrypt, Next.js + 2 more | Find emails |
| grab.com | #4,777 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 13 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 →