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 |
|---|---|---|---|
| ubuy.co.in | #23,737 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| hulkshare.com | #23,740 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt | Find emails |
| une.edu.au | #23,758 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | medium.com | #178 (Tranco) | Find emails |
| bigrock.in |
| #23,769 |
| Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more |
| Find emails |
| geograph.org.uk | #23,780 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 7 more | Find emails |
| alignable.com | #23,782 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 10 more | Find emails |
| bet365.de | #23,792 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| allofapps.com | #23,798 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| ottai.com | #23,803 | Alibaba Cloud DNS, Google Fonts, Google Tag Manager + 4 more | Find emails |
| bidence.net | #23,830 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| voip.ms | #23,868 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| scalefusion.com | #23,877 | ActiveCampaign, Akamai Bot Manager, Akamai edge/CDN + 28 more | Find emails |
| fatf-gafi.org | #23,907 | Azure DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| ahmed-elgohary.com | #23,916 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| docsity.com | #23,940 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN | Find emails |
| roboform.com | #23,983 | Sectigo, reCAPTCHA | Find emails |
| hoidap247.com | #24,018 | AnyMind Group, Cloudflare, DoubleClick (Google Ads) + 9 more | Find emails |
| annals.org | #24,067 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| solscan.io | #24,087 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| digistore24.com | #24,140 | Amazon CloudFront, Atlassian Cloud, Atlassian Statuspage + 16 more | Find emails |
| insead.edu | #24,149 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| timetreeapp.com | #24,151 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 10 more | Find emails |
| oeaw.ac.at | #24,158 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt | Find emails |
| drive.com.au | #24,159 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| arbitrum.io | #24,170 | 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 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →