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 |
|---|---|---|---|
| kunasystems.com | #13,849 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 7 more | Find emails |
| oed.com | #13,881 | Amazon (ACM), Amazon Route 53, Apache + 7 more | Find emails |
| postheaven.net | #13,916 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 3 more | Find emails |
| #594 (Tranco) |
| Find emails |
| 5 | cdnvideo.ru | #598 (Tranco) | Find emails |
| inkbunny.net | #13,917 | JW Player, Let's Encrypt, Nginx + 2 more | Find emails |
| campaignmonitor.com | #13,941 | Campaign Monitor, Cloudflare Bot Management, Cloudflare edge/CDN + 14 more | Find emails |
| amcrestcloud.com | #13,996 | Amazon Route 53, Apache, Google Analytics + 3 more | Find emails |
| film.ru | #14,003 | Drupal, Fancybox, Google Fonts + 10 more | Find emails |
| speedsmart.net | #14,026 | CDN Fonts, Cloudflare Web Analytics, Fancybox + 14 more | Find emails |
| newsnow.co.uk | #14,039 | Adobe Fonts (Typekit), Amazon Route 53, Apache + 4 more | Find emails |
| sitezoogle.com | #14,049 | Let's Encrypt, OpenResty, Ruby on Rails + 2 more | Find emails |
| zenwriting.net | #14,072 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 2 more | Find emails |
| phoca.cz | #14,169 | Apache, Font Awesome, Google AdSense + 6 more | Find emails |
| sonnen.de | #14,170 | AWS Lambda, Cloudflare edge/CDN, Google Tag Manager + 8 more | Find emails |
| unu.edu | #14,175 | Drupal, Fastly, Google Tag Manager + 8 more | Find emails |
| slb.com | #14,286 | DigiCert, Google Fonts, Google Tag Manager + 7 more | Find emails |
| bhf.org.uk | #14,329 | ASP.NET, Azure Front Door, CSC (Digital Brand Services) + 10 more | Find emails |
| questionpro.com | #14,333 | AdRoll, Bootstrap, Cloudflare + 16 more | Find emails |
| appcues.com | #14,376 | AWS Lambda, Amazon CloudFront, Amazon Route 53 + 25 more | Find emails |
| bark.us | #14,423 | Amazon (ACM), Amazon Route 53, Amplitude + 16 more | Find emails |
| nixplay.com | #14,492 | AdRoll, Amazon Route 53, Cloudflare edge/CDN + 9 more | Find emails |
| nationbuilder.com | #14,565 | Adobe Fonts (Typekit), Amazon CloudFront, Atlassian Cloud + 21 more | Find emails |
| neowin.net | #14,570 | Amazon Advertising, Awin, Blockthrough + 20 more | Find emails |
| pantheon.io | #14,582 | Amazon CloudFront, Amazon Route 53, Atlassian Cloud + 17 more | Find emails |
| sika.com | #14,619 | Cloudflare Web Analytics, Cloudflare edge/CDN, Fastly + 7 more | Find emails |
| urban.org | #14,640 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 12 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 →