CAPTCHA & Bot Protection
91,344 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9.1%). 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 | snapchat.com | #123 (Tranco) | Find emails |
| 2 | apache.org | #125 (Tranco) | Find emails |
| 3 | one.one | #160 (Tranco) | Find emails |
| 4 | w3.org |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| webmail-seguro.com.br | #26,729 | Cloudflare Turnstile, Google Tag Manager, Microsoft Clarity + 4 more | Find emails |
| ducati.com | #26,749 | Adobe Fonts (Typekit), Akamai Edge DNS, Akamai edge/CDN + 9 more | Find emails |
| squareblogs.net | #26,781 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 6 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| vin.com | #26,796 | ASP.NET, AngularJS, Bluesky + 13 more | Find emails |
| imageban.ru | #26,798 | Bootstrap, Cloudflare, Font Awesome + 12 more | Find emails |
| refined.site | #26,805 | AWS Lambda, Cloudflare, Cloudflare edge/CDN + 3 more | Find emails |
| brp.com | #26,813 | Adobe Experience Cloud (Launch), Adobe Fonts (Typekit), Azure DNS + 18 more | Find emails |
| themoneytizer.com | #26,834 | Amazon (ACM), Amazon Route 53, Apache + 17 more | Find emails |
| dp.ru | #26,851 | 24smi.net, DDoS-Guard, Express + 5 more | Find emails |
| shiprocket.in | #26,854 | Amazon CloudFront, Amazon Route 53, Branch + 18 more | Find emails |
| orb.net | #26,861 | Amazon CloudFront, Atlassian Cloud, Atlassian Statuspage + 12 more | Find emails |
| skk.moe | #26,869 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services + 3 more | Find emails |
| stepik.org | #26,928 | Amplitude, Google Analytics, Google Fonts + 17 more | Find emails |
| nzbplanet.net | #26,949 | Bootstrap, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| promodj.com | #26,950 | Let's Encrypt, Nginx, Yandex Metrica + 1 more | Find emails |
| cont.ws | #26,955 | Bootstrap, Font Awesome, Let's Encrypt + 10 more | Find emails |
| yoyospins.net | #26,997 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 5 more | Find emails |
| lamar.edu | #27,006 | ASP.NET, AddThis, Apache + 10 more | Find emails |
| fastweb.com | #27,016 | Amazon Route 53, CrazyEgg, DoubleClick (Google Ads) + 9 more | Find emails |
| smarthost.pl | #27,035 | Apache, Bootstrap, Fancybox + 16 more | Find emails |
| honeybook.com | #27,042 | AWS Lambda, Amazon Route 53, Cloudflare Web Analytics + 19 more | Find emails |
| uds.app | #27,043 | AWS Lambda, Amazon (ACM), Amazon CloudFront + 15 more | Find emails |
| theadx.com | #27,049 | Bootstrap, DigiCert, Google Analytics + 9 more | Find emails |
| yahooinc.com | #27,054 | AWS Lambda, Bootstrap, Cloudflare edge/CDN + 11 more | Find emails |
| centurytel.net | #27,069 | Bootstrap, DigiCert, Google Analytics + 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-2026-08-25-full-v2), snapshot August 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →