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 |
|---|---|---|---|
| digikey.com | #6,360 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt | Find emails |
| wolterskluwer.com | #6,382 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| sf.net | #6,394 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | medium.com | #178 (Tranco) | Find emails |
| superuser.com |
| #6,408 |
| Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 7 more |
| Find emails |
| decathlon.fr | #6,428 | CSC (Digital Brand Services), Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| jornada.com.mx | #6,439 | Cloudflare Bot Management, Cloudflare edge/CDN, DoubleClick (Google Ads) + 11 more | Find emails |
| unctad.org | #6,478 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 9 more | Find emails |
| royaleapi.com | #6,490 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| europeana.eu | #6,516 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| ub.edu | #6,518 | Cloudflare Bot Management, Cloudflare edge/CDN | Find emails |
| cinemark.com | #6,535 | ASP.NET, Adyen, Azure API Management + 15 more | Find emails |
| credly.com | #6,543 | Adobe Fonts (Typekit), Amazon Route 53, Bootstrap + 25 more | Find emails |
| seek.com | #6,545 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| ada.support | #6,564 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| twstalker.com | #6,591 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| britishmuseum.org | #6,600 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| jeuxvideo.com | #6,611 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| onedio.com | #6,635 | Amazon (ACM), Amazon CloudFront, Cloudflare + 6 more | Find emails |
| haveibeenpwned.com | #6,681 | Bluesky, Cloudflare, Cloudflare Bot Management + 5 more | Find emails |
| asurahosting.com | #6,698 | AOS, Bootstrap, Cloudflare + 11 more | Find emails |
| oecd-ilibrary.org | #6,704 | Azure DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| worldwildlife.org | #6,716 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| tenten.vn | #6,732 | Bootstrap, DoubleClick (Google Ads), Fancybox + 13 more | Find emails |
| lis-skins.com | #6,773 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| make.com | #6,831 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 1 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 →