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 |
|---|---|---|---|
| upi.edu | #27,167 | Bootstrap, Cloudflare, Cloudflare Bot Management + 9 more | Find emails |
| neoseeker.com | #27,198 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| colliers.com | #27,219 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | medium.com | #178 (Tranco) | Find emails |
| webador.com |
| #27,243 |
| Cloudflare Bot Management, Cloudflare edge/CDN, Google Analytics + 5 more |
| Find emails |
| gen.xyz | #27,261 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| lichess1.org | #27,266 | Bluesky, Cloudflare, Let's Encrypt + 3 more | Find emails |
| hardreset.info | #27,267 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| exploretock.com | #27,269 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| lawyers.com | #27,297 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| volleybox.net | #27,336 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| truthfinder.com | #27,371 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| mylife.com | #27,390 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt + 1 more | Find emails |
| marketingprofs.com | #27,396 | ASP.NET, Adobe Fonts (Typekit), Bootstrap + 13 more | Find emails |
| ntu.ac.uk | #27,399 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt + 1 more | Find emails |
| bmc.com | #27,451 | Adobe Experience Cloud (Launch), Adobe Fonts, Adobe Fonts (Typekit) + 8 more | Find emails |
| flipbuilder.com | #27,456 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| mingpao.com | #27,501 | Cloudflare Bot Management, Cloudflare edge/CDN | Find emails |
| betus.com.pa | #27,504 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| desty.page | #27,519 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| web-hosting.com | #27,525 | Cloudflare Bot Management, Cloudflare edge/CDN, Namecheap + 1 more | Find emails |
| chatbase.co | #27,576 | Chatbase, Google Workspace, Let's Encrypt + 5 more | Find emails |
| todaysparent.com | #27,594 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| onbuy.com | #27,616 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| easyhost.be | #27,619 | ASP.NET, Adobe Fonts (Typekit), Apache + 6 more | Find emails |
| vancouver.ca | #27,653 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt | 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 →