CAPTCHA & Bot Protection
56,649 of the 965,200 top sites in our Tranco top-1M census run reCAPTCHA (5.9%). Google's CAPTCHA/bot-scoring widget, the most widely deployed CAPTCHA by far. Detection is homepage-level HTML/header fingerprinting, so a site can run reCAPTCHA on other pages without it showing here.
Other captcha & bot protection
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | one.one | #160 (Tranco) | Find emails |
| 2 | pki.goog | #218 (Tranco) | Find emails |
| 3 | t-online.de | #220 (Tranco) | Find emails |
| 4 | dnsmadeeasy.com |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| leaseweb.net | #23,924 | Fastly, Font Awesome, Google Fonts + 3 more | Find emails |
| directadvert.ru | #23,929 | Cloudflare, Google Fonts, Let's Encrypt + 3 more | Find emails |
| cynet.com | #23,934 | CHEQ, Cloudflare, Cloudflare Bot Management + 13 more | Find emails |
| #291 (Tranco) |
| Find emails |
| 5 | duckdns.org | #295 (Tranco) | Find emails |
| seroundtable.com |
| #23,938 |
| Chart.js, Cloudflare, Cloudflare edge/CDN + 11 more |
| Find emails |
| treasurydirect.gov | #23,949 | Bootstrap, Cloudflare, jQuery | Find emails |
| widerplanet.com | #23,960 | Amazon (ACM), Amazon Route 53, Google Maps + 5 more | Find emails |
| defenseone.com | #23,985 | Azure DNS, Bootstrap, DigiCert + 7 more | Find emails |
| adaptavist.com | #23,994 | Amazon Route 53, Let's Encrypt, Next.js + 4 more | Find emails |
| humankinetics.com | #24,002 | Cloudflare edge/CDN, Fancybox, Google Tag Manager + 7 more | Find emails |
| hoidap247.com | #24,018 | Cloudflare, Cloudflare Turnstile, Google AdSense + 6 more | Find emails |
| dpd.co.uk | #24,037 | Akamai Edge DNS, Font Awesome, Foundation + 8 more | Find emails |
| soloist.ai | #24,059 | Akamai Edge DNS, Fastly, Google Identity Services + 5 more | Find emails |
| hianime.dk | #24,106 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 8 more | Find emails |
| zipoapps.com | #24,110 | Bootstrap, Fastly, Google Analytics + 8 more | Find emails |
| nml.com | #24,124 | Adobe Experience Cloud (Launch), Adobe Fonts (Typekit), Amazon CloudFront + 5 more | Find emails |
| blurams.com | #24,186 | Amazon Route 53, Cloudflare edge/CDN, DigiCert + 5 more | Find emails |
| techsterowniki.pl | #24,190 | Font Awesome, Google Fonts, Google Tag Manager + 4 more | Find emails |
| flightstats.com | #24,205 | Amazon (ACM), Amazon Route 53, Google Analytics + 6 more | Find emails |
| nzxt.com | #24,251 | Cloudflare edge/CDN, ConsentMo, Klaviyo + 7 more | Find emails |
| paltalk.com | #24,293 | Amazon Route 53, Cloudflare Web Analytics, Cloudflare edge/CDN + 9 more | Find emails |
| dotandkey.com | #24,315 | Cloudflare edge/CDN, Convert, Google Tag Manager + 8 more | Find emails |
| ny1.com | #24,338 | Adobe Experience Cloud (Launch), Adobe Target, Amazon (ACM) + 5 more | Find emails |
| xcelenergy.com | #24,351 | Adobe Experience Cloud (Launch), Adyen, Amazon Advertising + 26 more | Find emails |
| lamborghini.com | #24,367 | Amazon Route 53, DigiCert, Dynatrace + 4 more | Find emails |
| logdna.com | #24,368 | Amazon Route 53, Cloudflare edge/CDN, Google Tag Manager + 3 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 965,200-domain Tranco top-1M census (run top1m-2026-08-20-full), snapshot August 21, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →