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 |
|---|---|---|---|
| opendatabot.ua | #45,725 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 6 more | Find emails |
| powerhost.cl | #45,727 | Bootstrap, Google Analytics, Google Fonts + 7 more | Find emails |
| shmoop.com | #45,741 | Adobe Fonts (Typekit), Amazon (ACM), Amazon Route 53 + 12 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| nmi.com | #45,774 | AOS, Bootstrap, Cloudflare Bot Management + 32 more | Find emails |
| guides.co | #45,808 | Amazon (ACM), Amazon Route 53, Google Fonts + 6 more | Find emails |
| black.host | #45,810 | Bootstrap, Cloudflare Web Analytics, Cloudflare edge/CDN + 13 more | Find emails |
| erosberry.com | #45,826 | Ahrefs Analytics, Google Analytics, Google Tag Manager + 4 more | Find emails |
| gosupps.com | #45,827 | Cloudflare, Cloudflare edge/CDN, Fancybox + 10 more | Find emails |
| sabic.com | #45,830 | ASP.NET, DigiCert, Google Tag Manager + 2 more | Find emails |
| xtream.com | #45,843 | BrightEdge, DigiCert, Drupal + 6 more | Find emails |
| thegrocer.co.uk | #45,853 | Adobe Experience Cloud (Launch), Adobe Fonts (Typekit), Amazon (ACM) + 13 more | Find emails |
| swisslos.ch | #45,887 | Google Tag Manager, Usercentrics, reCAPTCHA v3 | Find emails |
| aarons.com | #45,891 | Azure DNS, Azure Front Door, BugHerd + 17 more | Find emails |
| modivo.pl | #45,904 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 3 more | Find emails |
| flvs.net | #45,929 | Adobe Fonts (Typekit), Azure API Management, Azure DNS + 8 more | Find emails |
| visorando.com | #45,964 | Apache, Google Identity Services, Matomo + 3 more | Find emails |
| npg.games | #45,965 | Bazaarvoice, Cloudflare edge/CDN, Fancybox + 13 more | Find emails |
| automationanywhere.com | #45,968 | AdRoll, Adyen, Akamai Edge DNS + 31 more | Find emails |
| thejoint.com | #45,999 | Amazon Advertising, Bootstrap, Cloudflare + 18 more | Find emails |
| yoursix.com | #46,004 | Amazon CloudFront, Atlassian Cloud, Atlassian Statuspage + 25 more | Find emails |
| raymondjames.com | #46,012 | Akamai Bot Manager, Akamai Edge DNS, Akamai edge/CDN + 5 more | Find emails |
| rozee.pk | #46,013 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 14 more | Find emails |
| pricetravel.com | #46,021 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| nbg.gr | #46,023 | ASP.NET, Akamai Edge DNS, Azure API Management + 5 more | Find emails |
| streamruby.com | #46,031 | Bootstrap, Cloudflare, Cloudflare Turnstile + 6 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 →