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 |
|---|---|---|---|
| buscalibre.es | #248,565 | Amazon (ACM), Amazon Route 53, Google Identity Services + 3 more | Find emails |
| transfermarkt.be | #249,342 | AWS WAF, Amazon CloudFront, Let's Encrypt + 1 more | Find emails |
| stillwhite.com.au | #249,493 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| kier.co.uk | #250,574 | ASP.NET, Amazon CloudFront, Azure Front Door + 15 more | Find emails |
| asapaviationsupplies.com | #250,767 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| redf.in | #250,833 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| internetofnsn.com | #251,404 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| asapmilitarycomponents.com | #251,591 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| nsnpartsnow.com | #251,613 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| music-map.com | #251,864 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| oldkhaki.co.za | #252,002 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| versatilecredit.com | #252,235 | AWS WAF, Amazon Route 53, Amazon Web Services + 1 more | Find emails |
| vitalaero.com | #252,405 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| sparesuniverse.com | #252,464 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| rapidavparts.com | #252,995 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| catvets.com | #253,202 | Adobe Experience Cloud (Launch), Amazon (ACM), Amazon CloudFront + 21 more | Find emails |
| buymarinecomponents.com | #253,234 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| aerospacepartsinventory.com | #253,296 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| ainsnparts.com | #253,352 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| fashiola.in | #253,873 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| dreamvegas.com | #254,235 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| sms-group.com | #254,295 | AWS WAF, Amazon (ACM), Amazon Web Services | Find emails |
| proteacher.net | #254,643 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| is24.de | #254,772 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 1 more | Find emails |
| harpersbazaar.com.sg | #255,157 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 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 →