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.
| # | 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 |
|---|---|---|---|
| auctionsinternational.com | #338,813 | AWS WAF, Amazon (ACM), Amazon Route 53 + 2 more | Find emails |
| tntsports.cl | #339,486 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| albat.com | #339,752 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| partsengine.ca | #340,231 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| mediastorehouse.com.au | #340,238 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| dxpo.jp | #340,300 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| redasafe.com | #340,361 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| lentesworld.com.mx | #340,959 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| iava.org | #341,238 | AWS WAF, Amazon Web Services, Let's Encrypt + 1 more | Find emails |
| esportsdesk.com | #341,309 | AWS WAF, Amazon (ACM), Amazon Web Services + 2 more | Find emails |
| melmo-app.com | #341,471 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| science.edu.sg | #341,616 | AWS WAF, Akamai Edge DNS, Amazon (ACM) + 1 more | Find emails |
| espn.com.gt | #342,136 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| donneesquebec.ca | #342,149 | AWS WAF, Amazon (ACM), Amazon Route 53 + 2 more | Find emails |
| betterhelpteens.com | #342,510 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| mai-ko.com | #342,528 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| lottemartzetta.com | #343,040 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| clickdealer.com | #343,429 | AWS WAF, Amazon (ACM), Amazon Route 53 + 19 more | Find emails |
| huduser.org | #343,439 | AWS WAF, Amazon Route 53 | Find emails |
| expansivedistribution.com | #343,541 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| tannertrading.co.uk | #345,024 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| mi-3.com.au | #345,074 | AWS WAF, Amazon (ACM), Amazon CloudFront + 2 more | Find emails |
| luxurysicilyvilla.com | #345,776 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| longtermplan.nhs.uk | #345,966 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| adzuna.sg | #346,215 | 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 →