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 |
|---|---|---|---|
| femalemag.com.sg | #880,750 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| watchfinder.hr | #881,023 | AWS WAF, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| crowdcompass.com | #881,367 | 6sense, Adobe Experience Cloud (Launch), Amazon (ACM) + 16 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| okking8.cc | #882,418 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 0123win.com | #882,595 | ASP.NET, Amazon (ACM), Amazon CloudFront + 4 more | Find emails |
| 0ok999.net | #882,618 | ASP.NET, Amazon (ACM), Amazon CloudFront + 4 more | Find emails |
| 1a8rs88.top | #882,753 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 331165.com | #882,907 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 333win8.com | #882,914 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 33win8.bet | #882,922 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 66123666.com | #883,157 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 6nohu.vip | #883,192 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 789b77.com | #883,299 | ASP.NET, Amazon (ACM), Amazon CloudFront + 8 more | Find emails |
| 789p1.vip | #883,307 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 88806888.vip | #883,403 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 88880102.app | #883,404 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 98wn56.com | #883,502 | ASP.NET, Amazon (ACM), Amazon CloudFront + 5 more | Find emails |
| 99666699.com | #883,503 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 99956799.vip | #883,504 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| banca973.com | #884,865 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| betsmith1015.com | #885,243 | AWS WAF, Amazon (ACM), Amazon CloudFront + 1 more | Find emails |
| breebronne.de | #885,682 | AWS WAF, Amazon (ACM), Amazon CloudFront | Find emails |
| cemigsim.com.br | #886,169 | AWS WAF, Amazon (ACM), Amazon Route 53 + 2 more | Find emails |
| cvk4829.com | #886,960 | AWS WAF, Amazon Route 53, Amazon Web Services | Find emails |
| europarcskaatsheuvel.nl | #888,246 | AWS WAF, Amazon (ACM), Amazon CloudFront | 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 →