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 |
|---|---|---|---|
| trueachievements.com | #10,677 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| bet365.gr | #10,678 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| okstate.edu | #10,741 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt + 1 more | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | medium.com | #178 (Tranco) | Find emails |
| skillshare.com | #10,788 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| action1.com | #10,793 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| nownodes.io | #10,820 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 5 more | Find emails |
| skokka.co.in | #10,845 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| miniclip.com | #10,846 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 5 more | Find emails |
| doaj.org | #10,848 | Bluesky, Cloudflare, Cloudflare Bot Management + 7 more | Find emails |
| fordham.edu | #10,946 | Adobe Fonts (Typekit), Azure DNS, BrightEdge + 13 more | Find emails |
| studyisland.com | #10,963 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 9 more | Find emails |
| distrokid.com | #10,971 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| librarything.com | #10,981 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| avaaz.org | #10,997 | Astro, Cloudflare, Cloudflare Bot Management + 4 more | Find emails |
| gov.il | #11,017 | Cloudflare Bot Management, Cloudflare edge/CDN, Sectigo | Find emails |
| dergipark.org.tr | #11,018 | Bootstrap, DoubleClick (Google Ads), Google Analytics + 9 more | Find emails |
| open.ac.uk | #11,057 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services + 1 more | Find emails |
| perfops.net | #11,095 | Adobe Experience Cloud (Launch), Bootstrap, Disqus + 19 more | Find emails |
| vpnjantit.com | #11,109 | Apache, Bootstrap, Cloudflare + 16 more | Find emails |
| retailmenot.com | #11,123 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| cbre.com | #11,129 | Akamai Edge DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| usgbc.org | #11,141 | AOS, Adobe Fonts (Typekit), Bootstrap + 22 more | Find emails |
| earnest.com | #11,160 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| delugerpg.com | #11,162 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| filmfreeway.com | #11,169 | 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 →