CAPTCHA & Bot Protection
90,376 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9%). 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 |
|---|---|---|---|
| awn.com | #36,704 | Bluesky, Broadstreet, Cloudflare + 12 more | Find emails |
| paulbunyan.net | #36,706 | Apache, Bootstrap, DoubleClick (Google Ads) + 6 more | Find emails |
| environment.gov.au | #36,757 | Akamai Bot Manager, Akamai edge/CDN, Drupal + 6 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| malaga.eu | #36,814 | Bootstrap, Google Tag Manager, Meta Pixel + 2 more | Find emails |
| calgary.ca | #36,851 | Adobe Experience Cloud (Launch), Azure Front Door, Bootstrap + 13 more | Find emails |
| vitekivpddns.com | #36,866 | ASP.NET, Google Fonts, Let's Encrypt + 3 more | Find emails |
| xosothantai.com | #36,879 | Google Analytics, Let's Encrypt, Microsoft IIS + 4 more | Find emails |
| estantevirtual.com.br | #36,909 | Amazon Route 53, Bootstrap, DoubleClick (Google Ads) + 9 more | Find emails |
| modernghana.com | #36,926 | Bootstrap, Cloudflare, Cloudflare Bot Management + 16 more | Find emails |
| energizedit.com | #36,928 | Apache, Bootstrap, Font Awesome + 15 more | Find emails |
| kuow.org | #36,931 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| df.cl | #36,939 | Axios, Bootstrap, Cloudflare + 14 more | Find emails |
| inhclick.uk | #36,956 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 12 more | Find emails |
| server-eye.de | #36,959 | Adobe Fonts (Typekit), Cloudflare, ConsentMo + 5 more | Find emails |
| bitrue.com | #36,968 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 12 more | Find emails |
| surlatable.com | #36,976 | Amazon CloudFront, Amazon Route 53, Apple Pay + 14 more | Find emails |
| eurocontrol.int | #36,979 | Cloudflare Turnstile, Cloudflare edge/CDN, Drupal + 6 more | Find emails |
| usizy.com | #36,980 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| nuveen.com | #37,014 | Akamai Bot Manager, Akamai Edge DNS, Akamai edge/CDN + 7 more | Find emails |
| triberr.com | #37,026 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 14 more | Find emails |
| servicefusion.com | #37,033 | ASP.NET, Amazon CloudFront, Amazon Route 53 + 24 more | Find emails |
| comic-con.org | #37,062 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 8 more | Find emails |
| finanzen.ch | #37,111 | Azure DNS, DigiCert, Google Tag Manager + 3 more | Find emails |
| cica.es | #37,132 | Apache, Backbone.js, Foundation + 10 more | Find emails |
| historic-uk.com | #37,152 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Fonts + 8 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-2026-08-24-full), snapshot August 24, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →