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 |
|---|---|---|---|
| 1clickvpn.net | #18,616 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 7 more | Find emails |
| gtt.net | #18,637 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 8 more | Find emails |
| sophi.io | #18,657 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 12 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| military.eu | #18,659 | Adform, Adobe Advertising Cloud, Adobe Analytics + 32 more | Find emails |
| slu.edu | #18,680 | Adobe Fonts (Typekit), Cloudflare, Font Awesome + 7 more | Find emails |
| workabroad.ph | #18,693 | AOS, Amazon Route 53, Bootstrap + 17 more | Find emails |
| lyricstranslate.com | #18,696 | Cloudflare, Cloudflare Turnstile, Cloudflare edge/CDN + 7 more | Find emails |
| portalinmobiliario.com | #18,714 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 7 more | Find emails |
| dice.fm | #18,723 | Branch, Braze, Cloudflare + 12 more | Find emails |
| createsend.com | #18,739 | Campaign Monitor, DigiCert, Google Tag Manager + 3 more | Find emails |
| jleague.jp | #18,789 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 11 more | Find emails |
| nanoleaf.me | #18,809 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 7 more | Find emails |
| kiva.org | #18,814 | Adobe Fonts (Typekit), Amazon Route 53, Fastly + 11 more | Find emails |
| jci.org | #18,842 | AddThis, Amazon Route 53, Apache + 6 more | Find emails |
| colocrossing.com | #18,846 | Apache, Bootstrap, Font Awesome + 9 more | Find emails |
| adultsearch.com | #18,879 | Cloudflare, Cloudflare Turnstile, Cloudflare Web Analytics + 9 more | Find emails |
| onlydomains.com | #18,889 | Atlassian Statuspage, Bootstrap, Cloudflare edge/CDN + 9 more | Find emails |
| limelight.pk | #18,916 | Amazon Route 53, Cloudflare edge/CDN, Google Ads Conversion + 8 more | Find emails |
| olympustaff.com | #18,973 | Blogger, Bootstrap, Cloudflare + 10 more | Find emails |
| twc1.net | #18,976 | Google Fonts, Nginx, Yandex Metrica + 1 more | Find emails |
| dream-singles.com | #18,991 | Ahrefs Analytics, Amazon (ACM), Amazon Route 53 + 21 more | Find emails |
| biedronka.pl | #18,994 | Cloudflare Bot Management, Cloudflare Turnstile, Cloudflare edge/CDN + 4 more | Find emails |
| privy.com | #19,040 | Cloudflare, Cloudflare edge/CDN, Google Hosted Libraries + 11 more | Find emails |
| filelist.io | #19,041 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| bluesoft.com.br | #19,051 | Amazon (ACM), Amazon CloudFront, Apache + 16 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 →