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 |
|---|---|---|---|
| paidforarticles.in | #119,585 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 15 more | Find emails |
| qcad.org | #119,588 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 8 more | Find emails |
| webnode.pt | #119,596 | Amazon Route 53, Convert, DoubleClick (Google Ads) + 7 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| allacademic.com | #119,611 | Apache, Google Analytics, jQuery + 1 more | Find emails |
| eil.com | #119,627 | ASP.NET, Amazon (ACM), Amazon Route 53 + 19 more | Find emails |
| servetheworld.net | #119,635 | Font Awesome, Google Analytics, Let's Encrypt + 6 more | Find emails |
| tc-v.com | #119,636 | ASP.NET, DoubleClick (Google Ads), Google Ads Conversion + 9 more | Find emails |
| intrtel.ru | #119,642 | Fancybox, Let's Encrypt, Nginx + 3 more | Find emails |
| com.ar | #119,649 | Apache, Font Awesome, Google Analytics + 9 more | Find emails |
| cyberpatrol.com | #119,667 | Amazon (ACM), Amazon Route 53, Bootstrap + 5 more | Find emails |
| avtovokzal-on-line.ru | #119,682 | Bootstrap, Font Awesome, Let's Encrypt + 6 more | Find emails |
| unitedutilities.com | #119,706 | AngularJS, Azure API Management, Bootstrap + 10 more | Find emails |
| despair.com | #119,711 | Cloudflare edge/CDN, Font Awesome, Google Fonts + 7 more | Find emails |
| bunddler.com | #119,715 | ASP.NET, Cloudflare, Cloudflare Web Analytics + 13 more | Find emails |
| orderinn.com | #119,716 | ASP.NET, Bootstrap, DigiCert + 13 more | Find emails |
| iflat.ru | #119,717 | Bootstrap, DDoS-Guard, Fancybox + 12 more | Find emails |
| oakcha.com | #119,721 | Attentive, Cloudflare edge/CDN, ConsentMo + 8 more | Find emails |
| barry.edu | #119,728 | ASP.NET, Azure API Management, Bootstrap + 13 more | Find emails |
| cardosystems.com | #119,735 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 6 more | Find emails |
| gruv.com | #119,749 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| sercomtel.com.br | #119,753 | Akamai edge/CDN, Apache, Bootstrap + 9 more | Find emails |
| geolsoc.org.uk | #119,763 | ASP.NET, Bootstrap, Cloudflare + 9 more | Find emails |
| thefl.org | #119,772 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 5 more | Find emails |
| oatext.com | #119,784 | Apache, Foundation, Google Analytics + 7 more | Find emails |
| acumbamail.com | #119,790 | AOS, Django, Google Identity Services + 12 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 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →