CAPTCHA & Bot Protection
90,376 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9%). 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 |
|---|---|---|---|
| offsec.com | #103,227 | Astro, Cloudflare edge/CDN, Cookiebot + 8 more | Find emails |
| adoric.com | #103,282 | AddToAny, Cloudflare, Cloudflare edge/CDN + 6 more | Find emails |
| mdm-complect.ru | #103,325 | Bitrix, Fancybox, PHP + 5 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| sermo.com |
| #103,326 |
| Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 10 more |
| Find emails |
| redoxengine.com | #103,340 | Amazon CloudFront, Amazon Route 53, Amazon S3 + 18 more | Find emails |
| bigdutchman.com | #103,345 | Apache, Bootstrap, DigiCert + 13 more | Find emails |
| 76.ru | #103,351 | DDoS-Guard, Let's Encrypt | Find emails |
| xpatjobs.com | #103,352 | ASP.NET, Cloudflare, Cloudflare Web Analytics + 8 more | Find emails |
| nernter.com | #103,360 | Amazon (ACM), Amazon Route 53, Bootstrap + 14 more | Find emails |
| archivists.org | #103,366 | AddThis, Apache, Bootstrap + 14 more | Find emails |
| nuxe.com | #103,370 | Cloudflare edge/CDN, Google Tag Manager, Let's Encrypt + 7 more | Find emails |
| schooljobs.com | #103,371 | ASP.NET, AddThis, Amazon Route 53 + 9 more | Find emails |
| netexplora.com | #103,373 | Apache, Bootstrap, Font Awesome + 11 more | Find emails |
| bidspotter.co.uk | #103,454 | ASP.NET, Amazon (ACM), Amazon CloudFront + 16 more | Find emails |
| foxentry.com | #103,513 | Calendly, Cloudflare, Cloudflare edge/CDN + 13 more | Find emails |
| acwebconnecting.com | #103,514 | Foundation, Google Fonts, Leaflet + 5 more | Find emails |
| digiconomist.net | #103,536 | Apache, Feedburner, Google AdSense + 9 more | Find emails |
| fontplus.jp | #103,562 | Amazon CloudFront, Amazon Route 53, Cloudflare edge/CDN + 10 more | Find emails |
| arivihan.com | #103,619 | Amazon (ACM), Amazon Route 53, Google Analytics + 10 more | Find emails |
| bidiotv.com | #103,639 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 3 more | Find emails |
| divinehindu.in | #103,701 | Cloudflare edge/CDN, GoKwik, Let's Encrypt + 4 more | Find emails |
| duniabokep.org | #103,708 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 2 more | Find emails |
| giysi.in | #103,750 | Cloudflare edge/CDN, GoKwik, Google Analytics + 11 more | Find emails |
| iqper.com | #103,801 | ASP.NET, Google Fonts, Let's Encrypt + 5 more | Find emails |
| kopeechka.by | #103,850 | Bitrix, Fancybox, Google Analytics + 10 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-2026-08-24-full), snapshot August 24, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →