CAPTCHA & Bot Protection
49,994 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 |
|---|---|---|---|
| wise.com | #1,088 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| hostinger.com | #1,099 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Fonts + 6 more | Find emails |
| economist.com | #1,107 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services + 1 more | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | nist.gov | #231 (Tranco) | Find emails |
| gofundme.com | #1,110 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 22 more | Find emails |
| skroutz.gr | #1,142 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN | Find emails |
| lichess.org | #1,170 | Bluesky, Cloudflare, Let's Encrypt + 3 more | Find emails |
| furaffinity.net | #1,183 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| spankbang.com | #1,192 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| namu.wiki | #1,211 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| boyfriendtv.com | #1,213 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| fanfiction.net | #1,256 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| stackexchange.com | #1,259 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 5 more | Find emails |
| fmkorea.com | #1,264 | Akamai Bot Manager, Amazon Route 53, Let's Encrypt + 1 more | Find emails |
| blooket.com | #1,303 | Cloudflare Bot Management, Cloudflare edge/CDN, CookieYes + 10 more | Find emails |
| beboo.ru | #1,330 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 4 more | Find emails |
| autotrader.co.uk | #1,333 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| hollywoodbets.net | #1,338 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| funpay.com | #1,340 | Cloudflare, Nginx, PHP + 2 more | Find emails |
| e621.net | #1,346 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| thisvid.com | #1,347 | Cloudflare, Google Analytics, Google Fonts + 8 more | Find emails |
| id.me | #1,349 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| gcash.com | #1,356 | AWS Lambda, Adobe Fonts (Typekit), Amazon Route 53 + 15 more | Find emails |
| pornone.com | #1,359 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 4 more | Find emails |
| fdown.net | #1,373 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| missav.ws | #1,378 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 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 →