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 |
|---|---|---|---|
| zeffy.com | #11,472 | AWS Lambda, Amazon Advertising, Amplitude + 36 more | Find emails |
| grow.me | #11,486 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 13 more | Find emails |
| awin.com | #11,520 | Akamai Bot Manager, Akamai edge/CDN, Akamai mPulse + 18 more | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | nist.gov | #231 (Tranco) | Find emails |
| pathofexile.com |
| #11,521 |
| Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more |
| Find emails |
| leo.org | #11,549 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| bloomsbury.com | #11,600 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN | Find emails |
| interserver.net | #11,671 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| allianz.de | #11,702 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| manomano.fr | #11,719 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| pitchbook.com | #11,734 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | 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 |
| hypebeast.com | #11,807 | Adobe Fonts, Adobe Fonts (Typekit), Amazon (ACM) + 12 more | 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 |
| 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, Brightcove, Cloudflare Bot Management + 6 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 + 1 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 |
| graphicriver.net | #12,174 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 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 →