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 |
|---|---|---|---|
| estranky.sk | #55,464 | Adobe Experience Cloud (Launch), Bootstrap, DigiCert + 14 more | Find emails |
| atw.jp | #55,470 | Google Tag Manager, Nginx, Owl Carousel + 4 more | Find emails |
| missav01.com | #55,481 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 5 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| tovarbezpereplat.ru |
| #55,504 |
| Diginetica, Nginx, reCAPTCHA Enterprise |
| Find emails |
| shokz.com | #55,518 | Alibaba Cloud DNS, Cloudflare edge/CDN, Extend + 13 more | Find emails |
| capconnect.com | #55,543 | Apache, Bootstrap, Cloudflare + 15 more | Find emails |
| freshplaza.com | #55,544 | Azure API Management, Cloudflare edge/CDN, Google Analytics + 6 more | Find emails |
| wifire.me | #55,558 | Amazon CloudFront, Amazon Route 53, Bootstrap + 12 more | Find emails |
| soccerpunter.com | #55,566 | AddToAny, Bootstrap, Cloudflare + 19 more | Find emails |
| gencat.net | #55,582 | Fastly, Sectigo, jQuery + 1 more | Find emails |
| wink.com | #55,584 | Adobe Fonts, Adobe Fonts (Typekit), Amazon (ACM) + 15 more | Find emails |
| voe.sx | #55,608 | Bootstrap, Cloudflare, DDoS-Guard + 7 more | Find emails |
| works-hi.com | #55,613 | Amazon (ACM), Amazon CloudFront, Azure DNS + 9 more | Find emails |
| sys-con.com | #55,614 | GoDaddy Website Builder, GoDaddy | Find emails |
| zap.co.il | #55,621 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 9 more | Find emails |
| fuc.lol | #55,670 | Cloudflare edge/CDN, Google Fonts, Let's Encrypt + 3 more | Find emails |
| amacad.org | #55,684 | Azure DNS, ConsentMo, Drupal + 8 more | Find emails |
| noticiasagricolas.com.br | #55,695 | AddThis, Cloudflare, Cloudflare Web Analytics + 11 more | Find emails |
| line6.com | #55,699 | Algolia, Amazon Route 53, Bootstrap + 17 more | Find emails |
| chasse-aux-livres.fr | #55,703 | Clicky, Font Awesome, Google Cloud + 3 more | Find emails |
| boostra.ru | #55,708 | Flocktory, Google Fonts, Let's Encrypt + 11 more | Find emails |
| saludcastillayleon.es | #55,712 | Apache, Bootstrap, Meta Pixel + 6 more | Find emails |
| luxmed.pl | #55,718 | DigiCert, Imperva, Angular | Find emails |
| 40billion.com | #55,724 | ASP.NET, DigiCert, Google Ads Conversion + 11 more | Find emails |
| admedia.com | #55,727 | AOS, Amazon Route 53, Bootstrap + 18 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 →