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 |
|---|---|---|---|
| techdirt.com | #13,184 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 10 more | Find emails |
| creativemarket.com | #13,204 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| neurology.org | #13,207 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | nist.gov | #231 (Tranco) | Find emails |
| automox.com | #13,225 | Amazon CloudFront, Amazon Route 53, Amazon S3 + 12 more | Find emails |
| pcpartpicker.com | #13,262 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| imo.org | #13,288 | ASP.NET, Azure API Management, Azure DNS + 12 more | Find emails |
| givebutter.com | #13,297 | AWS Lambda, CHEQ, Cloudflare + 19 more | Find emails |
| leagueofgraphs.com | #13,379 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| giantbomb.com | #13,381 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| poe.com | #13,391 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| pushy.me | #13,403 | Amazon (ACM), Amazon Route 53, Bootstrap + 12 more | Find emails |
| aacrjournals.org | #13,425 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt + 1 more | Find emails |
| uillinois.edu | #13,463 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt | Find emails |
| inpost.pl | #13,464 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services + 1 more | Find emails |
| 000webhost.com | #13,469 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| magicline.com | #13,474 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| speechify.com | #13,488 | Cloudflare, Cloudflare edge/CDN, Greenhouse + 5 more | Find emails |
| tranny.one | #13,507 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Cloud DNS + 6 more | Find emails |
| doc.gov | #13,526 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| moeblog.cn | #13,533 | Cloudflare edge/CDN, Font Awesome, Google Analytics + 5 more | Find emails |
| mediaite.com | #13,539 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| townhall.com | #13,560 | ASP.NET, Amazon Advertising, AppNexus + 13 more | Find emails |
| cybernews.com | #13,567 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| heavy.com | #13,583 | Cloudflare, Font Awesome, Google Tag Manager + 6 more | Find emails |
| anotepad.com | #13,591 | Bootstrap, Cloudflare, Google Identity Services + 5 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 →