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 |
|---|---|---|---|
| italist.com | #32,477 | Amazon Route 53, Cloudflare edge/CDN, Let's Encrypt + 5 more | Find emails |
| cognigy.cloud | #32,483 | Amazon CloudFront, Amazon Route 53, Express + 6 more | Find emails |
| agibank.com.br | #32,504 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 15 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| publuu.com | #32,523 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 7 more | Find emails |
| phaidon.com | #32,551 | Adobe Fonts (Typekit), Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| webmarked.net | #32,559 | Bootstrap, Font Awesome, Google Fonts + 6 more | Find emails |
| atmosphere.tv | #32,573 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 11 more | Find emails |
| nwitimes.com | #32,575 | 33Across, Advertising.com, Amazon Advertising + 44 more | Find emails |
| r2b2.cz | #32,577 | Apache, Google Tag Manager, InMobi + 6 more | Find emails |
| saicloud.com | #32,579 | Amazon (ACM), Amazon Route 53, Font Awesome + 5 more | Find emails |
| jccm.es | #32,580 | Bootstrap, Drupal, Matomo + 3 more | Find emails |
| aopa.org | #32,585 | ASP.NET, Bootstrap, Cloudflare + 18 more | Find emails |
| 3qsdn.com | #32,603 | Google Tag Manager, HubSpot, Let's Encrypt + 3 more | Find emails |
| davidsbridal.com | #32,620 | Akamai Edge DNS, Amazon CloudFront, Cloudflare Bot Management + 8 more | Find emails |
| direct-credit.ru | #32,625 | AngularJS, Bitrix, PHP + 2 more | Find emails |
| winhost.com | #32,654 | ASP.NET, Adobe Fonts (Typekit), Bootstrap + 9 more | Find emails |
| kentek.ru | #32,657 | Bitrix, Bootstrap, Fancybox + 9 more | Find emails |
| nothing.tech | #32,666 | Awin, Cloudflare, Cloudflare Web Analytics + 15 more | Find emails |
| acortar.link | #32,670 | AngularJS, Bootstrap, Chatra + 13 more | Find emails |
| adview.com | #32,675 | Alibaba Cloud DNS, DigiCert, Google Fonts + 3 more | Find emails |
| gigaserver.cz | #32,689 | Apache, Font Awesome, Google Analytics + 13 more | Find emails |
| beams.co.jp | #32,693 | Adyen, Akamai Bot Manager, Akamai edge/CDN + 22 more | Find emails |
| gruposbf.com.br | #32,730 | Adopt, Akamai Edge DNS, Cookie-Script + 12 more | Find emails |
| lancasteronline.com | #32,742 | Cloudflare, CrazyEgg, DoubleClick (Google Ads) + 9 more | Find emails |
| streetsblog.org | #32,744 | Bluesky, Cloudflare, Google Analytics + 9 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 →