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 |
|---|---|---|---|
| mobalytics.gg | #5,969 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| vultr.com | #5,970 | Cloudflare Bot Management, Cloudflare edge/CDN, Sectigo | Find emails |
| buienradar.nl | #5,975 | ASP.NET, Akamai Edge DNS, Akamai edge/CDN + 11 more | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | nist.gov | #231 (Tranco) | Find emails |
| edmunds.com |
| #5,990 |
| Akamai Bot Manager, Akamai edge/CDN, Amazon Route 53 + 3 more |
| Find emails |
| paddypower.com | #6,007 | Cloudflare, Cloudflare Bot Management, Cloudflare Web Analytics + 2 more | Find emails |
| williamhill.com | #6,010 | Amazon (ACM), Amazon CloudFront, Cloudflare Bot Management + 4 more | Find emails |
| 1337x.to | #6,025 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| rona.ca | #6,039 | Adobe Experience Cloud (Launch), Cloudflare, Cloudflare Bot Management + 6 more | Find emails |
| nieuwsblad.be | #6,043 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| ucalgary.ca | #6,071 | Adobe Fonts (Typekit), Cloudflare Bot Management, Cloudflare edge/CDN + 9 more | Find emails |
| warcraftlogs.com | #6,086 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| formstack.com | #6,119 | AWS Lambda, Adobe Fonts (Typekit), Amazon (ACM) + 20 more | Find emails |
| xfree.com | #6,134 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 5 more | Find emails |
| euractiv.com | #6,138 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| thisisdax.com | #6,161 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services + 1 more | Find emails |
| rapidgator.net | #6,213 | Google Analytics, Google Tag Manager, Let's Encrypt + 5 more | Find emails |
| liveworksheets.com | #6,228 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| taylorfrancis.com | #6,231 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| codeforces.com | #6,235 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 5 more | Find emails |
| fragrantica.com | #6,244 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 4 more | Find emails |
| dexscreener.com | #6,252 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| rebrand.ly | #6,258 | AWS Lambda, Cloudflare, Cloudflare Bot Management + 10 more | Find emails |
| cimri.com | #6,270 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| forexfactory.com | #6,271 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| artnet.com | #6,284 | 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-2026-08-24-full), snapshot August 24, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →