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 |
|---|---|---|---|
| dashlane.com | #3,465 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 9 more | Find emails |
| is.gd | #3,483 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| faceit.com | #3,573 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | nist.gov | #231 (Tranco) | Find emails |
| smugmug.com | #3,579 | AB Tasty, Adobe Fonts (Typekit), Amazon (ACM) + 13 more | Find emails |
| monash.edu | #3,663 | Cloudflare Bot Management, Cloudflare edge/CDN, Sectigo | Find emails |
| domain.com | #3,664 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| apkpure.com | #3,682 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| news24.com | #3,708 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 9 more | Find emails |
| grafana.net | #3,783 | Adobe Target, Amazon Route 53, Clearbit + 7 more | Find emails |
| codepen.io | #3,807 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| mercari.com | #3,906 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN | Find emails |
| takeaway.com | #3,969 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| findlaw.com | #3,974 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| reverso.net | #3,982 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| grandviewresearch.com | #3,992 | Ahrefs Analytics, Bootstrap, Cloudflare + 15 more | Find emails |
| resume.com | #4,013 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| webnovel.com | #4,038 | Cloudflare Bot Management, Cloudflare edge/CDN, DigiCert | Find emails |
| findagrave.com | #4,042 | Amazon Advertising, Cloudflare, Cloudflare Bot Management + 14 more | Find emails |
| readthedocs.org | #4,051 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| spaceship.com | #4,079 | Cloudflare Bot Management, Cloudflare edge/CDN, Sectigo | Find emails |
| mygaru.com | #4,087 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 3 more | Find emails |
| searchengineland.com | #4,090 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 17 more | Find emails |
| ahajournals.org | #4,101 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| op.gg | #4,139 | Amazon CloudFront, Amazon Route 53, Cloudflare Bot Management + 6 more | Find emails |
| phpbb.com | #4,261 | 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-2026-08-24-full), snapshot August 24, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →