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 |
|---|---|---|---|
| historycolorado.org | #142,306 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| pasona.co.jp | #142,479 | AWS WAF, Amazon CloudFront | Find emails |
| yusen-logistics.com | #142,619 | AWS WAF, Amazon CloudFront, DigiCert | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| #142,689 |
| AWS WAF, Amazon (ACM), Amazon CloudFront |
| Find emails |
| kempstoncontrols.com | #143,000 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| thiememeulenhoff.nl | #143,047 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| finimize.com | #143,061 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| onepropertee.com | #143,571 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| blinklabs.xyz | #143,974 | AWS WAF, Amazon (ACM), Amazon CloudFront + 11 more | Find emails |
| execstays.com | #145,137 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| osac.gov | #145,161 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| m-78.jp | #145,211 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| adzuna.pl | #145,325 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| play.co.za | #145,387 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| artec3d.com | #145,415 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| kidscreen.com | #145,518 | AWS WAF, Amazon (ACM), Amazon Route 53 + 1 more | Find emails |
| thenewsmarket.com | #145,523 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 2 more | Find emails |
| scholastic.co.uk | #146,106 | AWS WAF, Adobe Fonts (Typekit), Amazon (ACM) + 8 more | Find emails |
| asap-distribution.com | #146,592 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| morfix.co.il | #146,609 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| pent.no | #146,778 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| emag.net | #146,848 | Amazon (ACM), Amazon CloudFront, NS1 | Find emails |
| bedroomvillas.com.au | #147,641 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| culturalheritage.org | #148,998 | ASP.NET, Amazon CloudFront, Amazon S3 + 21 more | Find emails |
| publicrecordsdata.us | #149,007 | 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 →