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 |
|---|---|---|---|
| symmetrymagazine.org | #152,139 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| ubuy.ke | #152,140 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| schuhe.de | #152,184 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 8 more | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | medium.com | #178 (Tranco) | Find emails |
| kosu.org | #152,209 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| archive-it.eu | #152,214 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 4 more | Find emails |
| socialdosa.com | #152,215 | Bootstrap, Cloudflare, Cloudflare Bot Management + 9 more | Find emails |
| ez3c.tw | #152,219 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| petkeen.com | #152,220 | Cloudflare, Cloudflare edge/CDN, ConsentMo + 11 more | Find emails |
| digikey.ca | #152,243 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt | Find emails |
| uptogo.com.tw | #152,247 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| ssyt.rip | #152,263 | AddToAny, Bootstrap, Cloudflare + 6 more | Find emails |
| ibw.com.ni | #152,268 | Apache, Bootstrap, Endurance International Group + 10 more | Find emails |
| cowcow.com | #152,272 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| pcma.org | #152,282 | Adyen, Brightcove, Cloudflare + 27 more | Find emails |
| cars-rentals.com | #152,319 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| tabakguru.de | #152,342 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| ovoko.de | #152,358 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| sheffieldforum.co.uk | #152,388 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| geopoliticalmonitor.com | #152,392 | AddToAny, Cloudflare, Cloudflare Bot Management + 9 more | Find emails |
| idoc.tips | #152,393 | Bootstrap, Cloudflare, Cloudflare Bot Management + 11 more | Find emails |
| sitesrow.com | #152,397 | Bootstrap, Cloudflare, Cloudflare Bot Management + 9 more | Find emails |
| eurogirlsescort.es | #152,425 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| ecf.com | #152,429 | Bluesky, Bootstrap, Cloudflare + 15 more | Find emails |
| thembaydev.com | #152,436 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| flagman.casino | #152,438 | Cloudflare, 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 →