Security & WAF
56,626 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA v2 (5.7%). Google's challenge-response service that verifies whether a site visitor is human or a bot. Detection is homepage-level HTML/header fingerprinting, so a site can run reCAPTCHA v2 on other pages without it showing here.
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | apache.org | #125 (Tranco) | Find emails |
| 2 | w3.org | #184 (Tranco) | Find emails |
| 3 | pushy.io | #467 (Tranco) | Find emails |
| 4 | sharethrough.com |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| sceducationlottery.com | #70,529 | ASP.NET, Bootstrap, Chart.js + 11 more | Find emails |
| asso-web.com | #70,533 | Bootstrap, Fancybox, Font Awesome + 15 more | Find emails |
| stockvault.net | #70,550 | BuySellAds, Cloudflare, Cloudflare edge/CDN + 14 more | Find emails |
| #594 (Tranco) |
| Find emails |
| 5 | cdnvideo.ru | #598 (Tranco) | Find emails |
| upl.uz | #70,592 | Google AdSense, Google Fonts, Let's Encrypt + 7 more | Find emails |
| ayntec.com | #70,637 | Cloudflare edge/CDN, Let's Encrypt, PayPal + 4 more | Find emails |
| chausson.fr | #70,638 | ASP.NET, Azure API Management, Bootstrap + 12 more | Find emails |
| h2g2.com | #70,665 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 13 more | Find emails |
| wunschgutschein.de | #70,696 | Cloudflare edge/CDN, CookieFirst, Google Tag Manager + 5 more | Find emails |
| gunpost.ca | #70,701 | AddToAny, Cloudflare, Cloudflare Bot Management + 15 more | Find emails |
| thedailywtf.com | #70,714 | ASP.NET, AddToAny, Cloudflare + 8 more | Find emails |
| pothys.com | #70,720 | Cloudflare, Cloudflare edge/CDN, Let's Encrypt + 8 more | Find emails |
| islamveihsan.com | #70,723 | Bootstrap, Cloudflare, Font Awesome + 11 more | Find emails |
| joinsuperset.com | #70,741 | AdRoll, Amazon Route 53, Font Awesome + 19 more | Find emails |
| primecursos.com.br | #70,751 | Cloudflare, Cloudflare edge/CDN, DMCA.com Protection + 8 more | Find emails |
| mangatv.net | #70,789 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| abctelefonos.com | #70,793 | Cloudflare, Cloudflare edge/CDN, Google AdSense + 4 more | Find emails |
| u-cursos.cl | #70,803 | Google Analytics, Google Tag Manager, PHP + 4 more | Find emails |
| 5starstudents.com | #70,824 | ASP.NET, Adobe Experience Cloud (Launch), Amazon Route 53 + 12 more | Find emails |
| cuprum.cl | #70,825 | ASP.NET, AddToAny, Amazon (ACM) + 11 more | Find emails |
| agroplem.ru | #70,879 | Bitrix, Fancybox, Google Fonts + 7 more | Find emails |
| playonlinux.com | #70,970 | Apache, Bulma, Font Awesome + 8 more | Find emails |
| prsync.com | #71,019 | ASP.NET, Google Analytics, Google Hosted Libraries + 6 more | Find emails |
| seedfinder.eu | #71,030 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 8 more | Find emails |
| teachingbooks.net | #71,051 | Azure DNS, Bluesky, Citrix NetScaler + 11 more | Find emails |
| fastbackgroundcheck.com | #71,053 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 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 →