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 |
|---|---|---|---|
| sourceforge.io | #11,741 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt | Find emails |
| telerik.com | #11,745 | Amazon Route 53, Azure API Management, Cloudflare edge/CDN + 8 more | Find emails |
| moneysavingexpert.com | #11,771 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | medium.com | #178 (Tranco) | Find emails |
| postman.co | #11,861 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| solaredge.com | #11,884 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| plurk.com | #11,886 | AnyMind Group, Cloudflare, Cloudflare Web Analytics + 7 more | Find emails |
| autoevolution.com | #11,906 | Cloudflare Bot Management, Cloudflare edge/CDN, Sectigo | Find emails |
| lexology.com | #11,908 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| adb.org | #11,924 | Akamai Edge DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| kw.com | #11,944 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| iconscout.com | #11,965 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| elcompanies.com | #11,989 | AppsFlyer, Bootstrap, Cloudflare Bot Management + 10 more | Find emails |
| bitmovin.com | #11,993 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| trevenque.es | #12,039 | Google Tag Manager, Nginx, Sectigo + 1 more | Find emails |
| bath.ac.uk | #12,134 | ASP.NET, Apache, Bluesky + 14 more | Find emails |
| classpass.com | #12,168 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| opencart.com | #12,193 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| eplus.jp | #12,203 | Akamai Edge DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 4 more | Find emails |
| globe.com.ph | #12,264 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| lguplus.com | #12,267 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| civitai.com | #12,289 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 7 more | Find emails |
| newspapers.com | #12,344 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 6 more | Find emails |
| lovart.ai | #12,350 | Alibaba Cloud DNS, Cloudflare edge/CDN, DigiCert + 5 more | Find emails |
| coolors.co | #12,361 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 7 more | Find emails |
| testmy.net | #12,380 | Bootstrap, Cloudflare, Cloudflare Bot Management + 8 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 →