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 |
|---|---|---|---|
| zalando.es | #7,072 | Akamai Bot Manager, Akamai edge/CDN, Amazon Route 53 + 2 more | Find emails |
| instapaper.com | #7,157 | Adobe Fonts, Adobe Fonts (Typekit), Amazon (ACM) + 8 more | Find emails |
| djangoproject.com | #7,165 | Amazon Route 53, Bluesky, Django + 8 more | Find emails |
| #154 (Tranco) |
| Find emails |
| 5 | flickr.com | #172 (Tranco) | Find emails |
| frontapp.com | #7,238 | Amazon CloudFront, Amazon Route 53, Cloudflare edge/CDN + 12 more | Find emails |
| bhaskar.com | #7,249 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 9 more | Find emails |
| zalando.pl | #7,300 | Akamai Bot Manager, Akamai edge/CDN, Amazon Route 53 + 2 more | Find emails |
| tokubai.co.jp | #7,378 | Amazon (ACM), Amazon Advertising, Amazon Route 53 + 9 more | Find emails |
| metacritic.com | #7,434 | Cloudflare Bot Management, Cloudflare edge/CDN, DoubleClick (Google Ads) + 6 more | Find emails |
| nanit.com | #7,555 | AB Tasty, Amazon Route 53, Attentive + 14 more | Find emails |
| getresponse.com | #7,569 | Amplitude, DigiCert, Microsoft 365 + 5 more | Find emails |
| etoro.com | #7,621 | Akamai Edge DNS, AppsFlyer, Cloudflare Bot Management + 12 more | Find emails |
| zalando.it | #7,642 | Akamai Bot Manager, Akamai edge/CDN, Amazon Route 53 + 2 more | Find emails |
| confluent.cloud | #7,661 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| brainly.in | #7,682 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 9 more | Find emails |
| janeapp.com | #7,859 | Adobe Fonts (Typekit), Amazon Route 53, Ashby + 6 more | Find emails |
| omny.fm | #7,903 | Cloudflare, Cloudflare edge/CDN, Let's Encrypt + 4 more | Find emails |
| acuityscheduling.com | #7,928 | Adobe Fonts, Adobe Fonts (Typekit), Amazon (ACM) + 16 more | Find emails |
| internationalcupid.com | #8,345 | Akamai Bot Manager, Akamai Edge DNS, Akamai edge/CDN + 9 more | Find emails |
| amateri.com | #8,458 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 7 more | Find emails |
| afrointroductions.com | #8,672 | Akamai Bot Manager, Akamai Edge DNS, Akamai edge/CDN + 9 more | Find emails |
| rawstory.com | #8,686 | Cloudflare, Fastly, Google Fonts + 4 more | Find emails |
| znanija.com | #8,743 | Cloudflare, Cloudflare Bot Management, Cloudflare Web Analytics + 8 more | Find emails |
| ably.net | #8,808 | Amazon Route 53, Cloudflare edge/CDN, Gatsby + 11 more | Find emails |
| embedly.com | #8,848 | Cloudflare, Cloudflare Bot Management, Cloudflare Web Analytics + 14 more | Find emails |
| todamateria.com.br | #8,882 | Amazon Route 53, Let's Encrypt, Nginx | 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 →