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 |
|---|---|---|---|
| nic.qpon | #41,613 | Endurance International Group, Google Fonts, Let's Encrypt + 3 more | Find emails |
| nhi.gov.tw | #41,614 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| asa.org.uk | #41,642 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 11 more | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | medium.com | #178 (Tranco) | Find emails |
| eevblog.com |
| #41,649 |
| Cloudflare, Let's Encrypt, Nginx |
| Find emails |
| fanart.tv | #41,664 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| uspto.report | #41,675 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| michigan.org | #41,695 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services + 1 more | Find emails |
| thedrinksbusiness.com | #41,703 | Adobe Fonts (Typekit), Cloudflare, Cloudflare Bot Management + 10 more | Find emails |
| dewaweb.com | #41,722 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| fuelly.com | #41,740 | Bootstrap, Cloudflare, Cloudflare Bot Management + 9 more | Find emails |
| huaren.us | #41,764 | Cloudflare, Cloudflare edge/CDN, DoubleClick (Google Ads) + 9 more | Find emails |
| observeinc.com | #41,779 | AWS Lambda, Amazon Route 53, Cloudflare Bot Management + 14 more | Find emails |
| hobbycraft.co.uk | #41,793 | Azure DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| um.ac.id | #41,820 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| utc.com | #41,824 | ASP.NET, Azure API Management, Azure Front Door + 5 more | Find emails |
| fajar.co.id | #41,830 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| mediamarkt.at | #41,837 | Akamai Edge DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| slotcatalog.com | #41,844 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| 11teamsports.com | #41,845 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| dehasher.com | #41,852 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| mfa.gov.il | #41,865 | Akamai Edge DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| bearblog.dev | #41,868 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| mein-mmo.de | #41,873 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 6 more | Find emails |
| lekarna.cz | #41,875 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| spoiledchild.com | #41,892 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 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 →