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 |
|---|---|---|---|
| 161.ru | #53,598 | DDoS-Guard, Let's Encrypt | Find emails |
| therecipecritic.com | #53,610 | Cloudflare, Cloudflare edge/CDN, ConsentMo + 6 more | Find emails |
| zenloop.com | #53,619 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 14 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| krakenfiles.com |
| #53,622 |
| Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more |
| Find emails |
| mega.cl | #53,632 | DoubleClick (Google Ads), Google Analytics, Google Fonts + 8 more | Find emails |
| owlstalk.co.uk | #53,643 | Apache, DoubleClick (Google Ads), Font Awesome + 6 more | Find emails |
| ic.cz | #53,645 | Bootstrap, Font Awesome, Google Analytics + 7 more | Find emails |
| viacom.com | #53,655 | AOS, Akamai Bot Manager, Akamai edge/CDN + 9 more | Find emails |
| platon.sk | #53,669 | Adobe Fonts (Typekit), Bootstrap, Font Awesome + 9 more | Find emails |
| firstbus.co.uk | #53,672 | Amazon (ACM), Amazon CloudFront, Apache + 18 more | Find emails |
| webtekno.com | #53,683 | Cloudflare, Cloudflare edge/CDN, DoubleClick (Google Ads) + 10 more | Find emails |
| pdfleader.com | #53,690 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| pennymac.com | #53,697 | Amazon Route 53, Bootstrap, DigiCert + 22 more | Find emails |
| tamindir.com | #53,703 | Cloudflare, Cloudflare edge/CDN, DoubleClick (Google Ads) + 10 more | Find emails |
| eatandsplit.com | #53,713 | Google Tag Manager, Let's Encrypt, Nginx + 2 more | Find emails |
| heinz.com | #53,722 | CSC (Digital Brand Services), Cloudinary, Contentful + 5 more | Find emails |
| gsccca.org | #53,728 | ASP.NET, Cloudflare, DigiCert + 8 more | Find emails |
| turkiyeburslari.gov.tr | #53,774 | ASP.NET, Azure API Management, Azure DNS + 9 more | Find emails |
| modirum.com | #53,776 | Google Tag Manager, Icons8, Let's Encrypt + 6 more | Find emails |
| sdi.net.id | #53,777 | AOS, Ahrefs Analytics, Font Awesome + 6 more | Find emails |
| status.io | #53,781 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 12 more | Find emails |
| researchr.org | #53,787 | Bootstrap, Google Analytics, Let's Encrypt + 5 more | Find emails |
| edns.de | #53,815 | Apache, DigiCert, Google Fonts + 3 more | Find emails |
| tamm.abudhabi | #53,821 | Dynatrace | Find emails |
| vbox7.com | #53,833 | Bootstrap, DigiCert, DoubleClick (Google Ads) + 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-2026-08-25-full-v2), snapshot August 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →