CAPTCHA & Bot Protection
91,344 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9.1%). Google's CAPTCHA/bot-scoring widget, the most widely deployed CAPTCHA by far. Detection is homepage-level HTML/header fingerprinting, so a site can run reCAPTCHA on other pages without it showing here.
Other captcha & bot protection
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | snapchat.com | #123 (Tranco) | Find emails |
| 2 | apache.org | #125 (Tranco) | Find emails |
| 3 | one.one | #160 (Tranco) | Find emails |
| 4 | w3.org |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| winthrop.edu | #95,826 | ASP.NET, Blogger, Bootstrap + 10 more | Find emails |
| resales-online.com | #95,840 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 14 more | Find emails |
| gomag.ro | #95,845 | ActiveCampaign, Bootstrap, Cloudflare + 15 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| neerus.com | #95,853 | Cloudflare edge/CDN, GoAffPro, GoKwik + 17 more | Find emails |
| conceptkart.com | #95,854 | Cloudflare edge/CDN, Google Cloud DNS, Google Hosted Libraries + 6 more | Find emails |
| dexcom.eu | #95,865 | Amplience, Cloudflare edge/CDN, Google Cloud DNS + 7 more | Find emails |
| aoindustries.com | #95,882 | Apache, Google Analytics, Google Tag Manager + 3 more | Find emails |
| knownsrv.com | #95,883 | Apache, Bootstrap, Cloudflare + 7 more | Find emails |
| ferrovial.com | #95,905 | Amazon (ACM), Amazon CloudFront, Apache + 8 more | Find emails |
| bemol.com.br | #95,909 | Amazon CloudFront, Google Tag Manager, Let's Encrypt + 6 more | Find emails |
| evilmadscientist.com | #95,913 | Apache, CleanTalk, Clicky + 9 more | Find emails |
| ndl.gov.in | #95,948 | Bootstrap, Font Awesome, Google Fonts + 10 more | Find emails |
| eiger.io | #95,950 | Adobe Fonts (Typekit), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| delta.app | #95,951 | AWS Lambda, Cloudflare, Cloudflare edge/CDN + 12 more | Find emails |
| gamekyo.com | #95,965 | Google Ads Conversion, Google Analytics, Google Tag Manager + 6 more | Find emails |
| 47brand.com | #95,972 | Attentive, Cloudflare edge/CDN, Google Tag Manager + 11 more | Find emails |
| 1dewa.zone | #95,973 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 5 more | Find emails |
| barrick.com | #95,981 | ASP.NET, BugHerd, Cloudflare edge/CDN + 7 more | Find emails |
| bol-online.com | #95,988 | Apache, Fancybox, Google Analytics + 4 more | Find emails |
| donguri-sora.com | #95,994 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 9 more | Find emails |
| tobaccofreekids.org | #96,031 | Cloudflare, Google Fonts, Google Tag Manager + 4 more | Find emails |
| wy.sk | #96,039 | Cookiebot, DigiCert, Google Fonts + 6 more | Find emails |
| revlon.com | #96,059 | Adobe Fonts (Typekit), Bazaarvoice, Bootstrap + 13 more | Find emails |
| unist.hr | #96,067 | AOS, ASP.NET, Apache + 9 more | Find emails |
| engineweb.jp | #96,092 | Amazon (ACM), Amazon Advertising, Amazon CloudFront + 13 more | Find emails |
Showing the first 10,000matches — add a filter to narrow.
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 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →