CAPTCHA & Bot Protection
3,100 of the 1,000,000 top sites in our Tranco top-1M census run AWS WAF CAPTCHA (0.3%). Amazon's CAPTCHA challenge product, part of AWS WAF's bot-mitigation features. Detection is homepage-level HTML/header fingerprinting, so a site can run AWS WAF CAPTCHA on other pages without it showing here.
Other captcha & bot protection
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | amazon.com | #25 (Tranco) | Find emails |
| 2 | imdb.com | #237 (Tranco) | Find emails |
| 3 | appsflyer.com | #302 (Tranco) | Find emails |
| 4 | amazon.co.uk |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| system76.com | #23,130 | AWS WAF, Ahrefs Analytics, Amazon (ACM) + 23 more | Find emails |
| pnpclearance.ph | #23,291 | AOS, AWS WAF, Amazon (ACM) + 10 more | Find emails |
| lexus.com | #23,416 | Amazon (ACM), Amazon CloudFront, AppNexus (Xandr) + 3 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| cccs.edu | #23,614 | Amazon CloudFront, Cloudflare, Cloudflare Bot Management + 13 more | Find emails |
| indischool.com | #23,693 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| wtp.waw.pl | #23,731 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| betsson.pe | #23,871 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| ycharts.com | #24,016 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| postmarkapp.com | #24,034 | AWS WAF, Amazon Route 53, Bugsnag + 15 more | Find emails |
| flightstats.com | #24,205 | Amazon (ACM), Amazon Route 53, Google Analytics + 6 more | Find emails |
| mobicontrolcloud.com | #24,270 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| onelook.com | #24,931 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| shbet800.com | #24,964 | ASP.NET, Amazon (ACM), Amazon CloudFront + 7 more | Find emails |
| greyhound.com | #24,970 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 2 more | Find emails |
| unocha.org | #25,087 | AWS WAF, Amazon (ACM), Amazon Web Services + 1 more | Find emails |
| eventbrite.fr | #25,261 | AWS WAF, Amazon (ACM), Amazon CloudFront + 19 more | Find emails |
| lot.com | #25,305 | Adform, Adobe Advertising Cloud, Adobe Analytics + 29 more | Find emails |
| wtwco.com | #25,402 | Amazon CloudFront, Font Awesome, Google Tag Manager + 9 more | Find emails |
| wada-ama.org | #25,457 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| songtexte.com | #25,554 | AWS WAF, Amazon (ACM), Amazon CloudFront + 12 more | Find emails |
| mb66e.top | #25,672 | ASP.NET, Amazon (ACM), Amazon CloudFront + 8 more | Find emails |
| theroot.com | #25,732 | AWS WAF, Amazon (ACM), Cloudflare | Find emails |
| f8beta2.com | #25,911 | ASP.NET, Amazon (ACM), Amazon CloudFront + 7 more | Find emails |
| coursiv.io | #25,977 | Amazon Route 53, Bootstrap, Cloudflare edge/CDN + 10 more | Find emails |
| peopleperhour.com | #26,039 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 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 →