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 |
|---|---|---|---|
| clubllondon.us | #117,993 | AdRoll, Adobe Fonts (Typekit), Bootstrap + 12 more | Find emails |
| gov.co | #118,008 | Amazon (ACM), Amazon CloudFront, Bootstrap + 7 more | Find emails |
| childrensmn.org | #118,013 | Amazon CloudFront, Bootstrap, Cloudflare edge/CDN + 15 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| teddybaldassarre.com | #118,023 | Affirm, Attentive, Cloudflare edge/CDN + 14 more | Find emails |
| quickhost.uk | #118,033 | Font Awesome, Google Analytics, Google Fonts + 8 more | Find emails |
| proxydocker.com | #118,037 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| iglobal.co | #118,044 | Amazon (ACM), Amazon Route 53, Google Fonts + 4 more | Find emails |
| bliks.pl | #118,074 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 4 more | Find emails |
| nibe.se | #118,078 | Ahrefs Analytics, Citrix NetScaler, Cloudflare Bot Management + 9 more | Find emails |
| imec-int.com | #118,082 | Adobe Fonts (Typekit), Drupal, Google Tag Manager + 6 more | Find emails |
| fleshlight.com | #118,093 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 8 more | Find emails |
| nickelinstitute.org | #118,104 | ASP.NET, Bootstrap, Cloudflare + 9 more | Find emails |
| marshallyin.com | #118,136 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| squaremeal.co.uk | #118,137 | ASP.NET, Adobe Fonts (Typekit), Azure API Management + 15 more | Find emails |
| mlc-wels.edu | #118,139 | Apache, Gravatar, Namecheap + 6 more | Find emails |
| viethwebhosting.com | #118,148 | Apache, Google Analytics, Google Fonts + 6 more | Find emails |
| datarush.es | #118,156 | Apache, Cloudflare Turnstile, Google Analytics + 9 more | Find emails |
| randi.org | #118,158 | Cloudflare Bot Management, Cloudflare edge/CDN, Fancybox + 5 more | Find emails |
| sexyhotline.tv | #118,164 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 11 more | Find emails |
| nspe.org | #118,174 | ASP.NET, Bootstrap, Cloudflare + 11 more | Find emails |
| arthrex.com | #118,180 | Adobe Fonts, Adobe Fonts (Typekit), Amazon (ACM) + 15 more | Find emails |
| brillcam.com | #118,194 | Cloudflare edge/CDN, Let's Encrypt, Shopify + 2 more | Find emails |
| fkwallet.io | #118,240 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 8 more | Find emails |
| ocularsolution.com | #118,265 | Google Analytics, Google Tag Manager, Let's Encrypt + 2 more | Find emails |
| harfington.com | #118,269 | Cloudflare, Cloudflare edge/CDN, Consentmanager.net + 11 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 →