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 |
|---|---|---|---|
| forvo.com | #17,079 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| mediamarkt.com.tr | #17,084 | Akamai Edge DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| tracker.network | #17,106 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | medium.com | #178 (Tranco) | Find emails |
| mtgdecks.net | #17,108 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| utas.edu.au | #17,126 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt | Find emails |
| englishlib.org | #17,146 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| barco.com | #17,178 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services + 1 more | Find emails |
| devcycle.com | #17,184 | Algolia, Amazon CloudFront, Amazon S3 + 21 more | Find emails |
| cadence.com | #17,210 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| zattoo.com | #17,219 | Akamai Edge DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 11 more | Find emails |
| mediamarkt.es | #17,228 | Akamai Edge DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| cineca.it | #17,293 | Akamai Edge DNS, Cloudflare Bot Management, Cloudflare edge/CDN | Find emails |
| quoka.de | #17,310 | ASP.NET, Cloudflare, Cloudflare Bot Management + 7 more | Find emails |
| squirt.org | #17,321 | Bluesky, Font Awesome, Google Tag Manager + 3 more | Find emails |
| read.ai | #17,324 | AWS Lambda, Amazon CloudFront, Amazon Route 53 + 15 more | Find emails |
| garnstudio.com | #17,332 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| crazydomains.com | #17,383 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| bio-link.se | #17,393 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 12 more | Find emails |
| mindat.org | #17,504 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| timesofmalta.com | #17,506 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| isi.edu | #17,546 | Bluesky, Bootstrap, Cloudflare Bot Management + 10 more | Find emails |
| philpapers.org | #17,556 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| totalenergies.com | #17,570 | Cloudflare Web Analytics, Cloudflare edge/CDN, Drupal + 4 more | Find emails |
| metasrc.com | #17,612 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| squadhelp.com | #17,626 | 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-2026-08-25-full-v2), snapshot August 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →