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 |
|---|---|---|---|
| openreview.net | #16,774 | Cloudflare, Google Analytics, Google Tag Manager + 8 more | Find emails |
| itemku.com | #16,792 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| proz.com | #16,825 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| #176 (Tranco) |
| Find emails |
| 5 | medium.com | #178 (Tranco) | Find emails |
| ovid.com | #16,832 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| hemnet.se | #16,837 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| hiwaifu.com | #16,864 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| stake.us | #16,868 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| computerhope.com | #16,871 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| xeconvert.com | #16,901 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| churnkey.co | #16,928 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 10 more | Find emails |
| griffith.edu.au | #16,929 | Cloudflare Bot Management, Cloudflare edge/CDN, DigiCert + 1 more | Find emails |
| bigrock.com | #16,930 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| xxxlutz.de | #16,933 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| grailed.com | #16,939 | Cloudflare Bot Management, Cloudflare edge/CDN, Let's Encrypt | Find emails |
| infowars.com | #16,959 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| contactout.com | #16,960 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 12 more | Find emails |
| peek-cloppenburg.de | #16,961 | CSC (Digital Brand Services), Cloudflare Bot Management, Cloudflare edge/CDN + 1 more | Find emails |
| manychat.com | #16,968 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Cloud DNS + 1 more | Find emails |
| educause.edu | #16,990 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| anilist.co | #16,996 | Bluesky, Cloudflare, Cloudflare Web Analytics + 6 more | Find emails |
| dns24.hu | #16,997 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | Find emails |
| cummins.com | #16,998 | Cloudflare Bot Management, Cloudflare edge/CDN | Find emails |
| tipranks.com | #16,999 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services + 2 more | Find emails |
| batdongsan.com.vn | #17,003 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| cgocable.ca | #17,035 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services | 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 →