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.
| # | 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 |
|---|---|---|---|
| discuss.com.hk | #51,693 | Axios, Cloudflare, Cloudflare Web Analytics + 12 more | Find emails |
| ifr.org | #51,697 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| karaoketexty.cz | #51,704 | Cloudflare, Gemius, Google Analytics + 8 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| forumcommunity.net | #51,713 | Cloudflare, Cloudflare Turnstile, Cloudflare Web Analytics + 6 more | Find emails |
| consumersenergy.com | #51,735 | ASP.NET, Bootstrap, DigiCert + 13 more | Find emails |
| kaluza.com | #51,749 | AWS Lambda, Adobe Fonts (Typekit), Cloudflare + 11 more | Find emails |
| swimoutlet.com | #51,773 | Cloudflare, Cloudflare edge/CDN, Let's Encrypt + 5 more | Find emails |
| annauniv.edu | #51,777 | Apache, Bootstrap, Font Awesome + 7 more | Find emails |
| imoview.com.br | #51,780 | ASP.NET, Amazon (ACM), Amazon CloudFront + 8 more | Find emails |
| dealer-fx.com | #51,786 | ASP.NET, Amazon (ACM), Amazon Route 53 + 17 more | Find emails |
| emeraldchat.com | #51,787 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 4 more | Find emails |
| personalizationmall.com | #51,793 | ASP.NET, Adobe Fonts (Typekit), Attentive + 13 more | Find emails |
| doujins.com | #51,795 | Font Awesome, Google Analytics, Google Hosted Libraries + 7 more | Find emails |
| playitagainsports.com | #51,815 | Adobe Fonts (Typekit), BigCommerce, BrightEdge + 12 more | Find emails |
| openweb.com.br | #51,851 | AddThis, Fancybox, Font Awesome + 10 more | Find emails |
| transperfect.com | #51,874 | Akamai edge/CDN, Akamai mPulse, DigiCert + 4 more | Find emails |
| mendelu.cz | #51,884 | Apache, Google Analytics, Google Tag Manager + 7 more | Find emails |
| henryschein.com | #51,897 | ASP.NET, Akamai Edge DNS, Akamai edge/CDN + 20 more | Find emails |
| oliviarodrigo.com | #51,900 | Amazon Route 53, Cloudflare edge/CDN, Google Tag Manager + 5 more | Find emails |
| dentalxchange.com | #51,910 | AWS Lambda, Amazon Route 53, CallRail + 12 more | Find emails |
| vtomske.ru | #51,921 | DDoS-Guard, Google Analytics, Let's Encrypt + 6 more | Find emails |
| agilexbiolabs.com | #51,927 | Google Ads Conversion, Google Analytics, Google Fonts + 7 more | Find emails |
| wisphub.net | #51,928 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 5 more | Find emails |
| cyberpunk.net | #51,941 | Amazon Route 53, Google Tag Manager, Let's Encrypt + 2 more | Find emails |
| itbox.ua | #51,992 | Cloudflare, Cloudflare edge/CDN, DoubleClick (Google Ads) + 8 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 →