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 |
|---|---|---|---|
| revparts.net | #15,070 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| streamelements.com | #15,071 | Cloudflare, Cloudflare Bot Management, Cloudflare Web Analytics + 4 more | Find emails |
| tibia.com | #15,075 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 4 more | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | nist.gov | #231 (Tranco) | Find emails |
| regjeringen.no | #15,087 | Azure DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| fender.com | #15,141 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| imginn.com | #15,163 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| sistema.gov.br | #15,170 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| eurowings.com | #15,172 | Akamai Edge DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| designrush.com | #15,198 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| commerce.gov | #15,206 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| caradisiac.com | #15,212 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| money.com | #15,224 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| healthaffairs.org | #15,237 | Azure DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| loaded.com | #15,246 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| nperf.com | #15,285 | Cloudflare, Cloudflare Bot Management, Cloudflare Web Analytics + 6 more | Find emails |
| lush.com | #15,312 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| boxrec.com | #15,318 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| europe1.fr | #15,322 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 4 more | Find emails |
| bnr.nl | #15,327 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| latrobe.edu.au | #15,336 | Cloudflare Bot Management, Cloudflare Web Analytics, Cloudflare edge/CDN + 2 more | Find emails |
| booksamillion.com | #15,340 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| screencastify.com | #15,358 | AWS Lambda, Amazon CloudFront, Atlassian Statuspage + 22 more | Find emails |
| jupyter.org | #15,372 | Bluesky, Bootstrap, Cloudflare + 12 more | Find emails |
| challonge.com | #15,374 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN | Find emails |
| suny.edu | #15,408 | Cloudflare Bot Management, Cloudflare edge/CDN, DigiCert + 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-2026-08-24-full), snapshot August 24, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →