CAPTCHA & Bot Protection
50,387 of the 1,000,000 top sites in our Tranco top-1M census run Cloudflare Turnstile (5%). Cloudflare's non-interactive CAPTCHA replacement, bundled free with its CDN/WAF. Detection is homepage-level HTML/header fingerprinting, so a site can run Cloudflare Turnstile on other pages without it showing here.
Other captcha & bot protection
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | x.com | #54 (Tranco) | Find emails |
| 2 | discord.com | #163 (Tranco) | Find emails |
| 3 | flickr.com | #172 (Tranco) | Find emails |
| 4 | soundcloud.com |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| krak.dk | #43,187 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| yydjc.top | #43,203 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| authorea.com | #43,285 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | medium.com | #178 (Tranco) | Find emails |
| anizm.net | #43,286 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| tierra.net | #43,306 | Adobe Fonts (Typekit), Amazon (ACM), Cloudflare Bot Management + 14 more | Find emails |
| reef2reef.com | #43,311 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| silpo.ua | #43,327 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| wbcsd.org | #43,329 | All in One SEO, Cookiebot, Google Tag Manager + 11 more | Find emails |
| hytale.com | #43,339 | Astro, Bluesky, Cloudflare + 3 more | Find emails |
| taxdome.com | #43,373 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| secrethostess.com | #43,383 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 7 more | Find emails |
| icontact.com | #43,404 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| cps.gov.uk | #43,407 | Civic Cookie Control, Cloudflare, Cloudflare edge/CDN + 6 more | Find emails |
| pixelcut.ai | #43,408 | ChatGPT Ads Pixel, Cloudflare, Cloudflare edge/CDN + 3 more | Find emails |
| wevideo.com | #43,412 | Cloudflare Bot Management, Cloudflare edge/CDN, ConsentMo + 12 more | Find emails |
| cinematoday.jp | #43,434 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 16 more | Find emails |
| technopolis.bg | #43,497 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| yuku.com | #43,513 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| ajronline.org | #43,515 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| anixter.com | #43,519 | Cloudflare Bot Management, Cloudflare edge/CDN, DigiCert | Find emails |
| alquds.co.uk | #43,523 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| aghanim.com | #43,545 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 7 more | Find emails |
| veolia.com | #43,553 | Cloudflare Bot Management, Cloudflare edge/CDN, ConsentMo + 8 more | Find emails |
| vonagebusiness.com | #43,578 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| truckersmp.com | #43,663 | Bootstrap, Cloudflare, Cloudflare Bot Management + 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 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →