Security & WAF
15,494 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA v3 (1.5%). Google's bot-detection service that scores traffic in the background without user interaction to block automated abuse. Detection is homepage-level HTML/header fingerprinting, so a site can run reCAPTCHA v3 on other pages without it showing here.
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | taboola.com | #187 (Tranco) | Find emails |
| 2 | afternic.com | #315 (Tranco) | Find emails |
| 3 | g.page | #451 (Tranco) | Find emails |
| 4 | teamviewer.com |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| recombee.com | #12,089 | AOS, Adobe Fonts (Typekit), Cloudflare + 7 more | Find emails |
| siteground.com | #12,095 | Amazon CloudFront, Amazon S3, Cookiebot + 9 more | Find emails |
| 34sp.com | #12,153 | Adobe Fonts (Typekit), Bootstrap, Fathom + 10 more | Find emails |
| #561 (Tranco) |
| Find emails |
| 5 | klaviyo.com | #597 (Tranco) | Find emails |
| exoclick.com |
| #12,202 |
| Cloudflare edge/CDN, Font Awesome, GitBook + 14 more |
| Find emails |
| nutaku.net | #12,224 | Amazon Route 53, DebugBear, Google Tag Manager + 3 more | Find emails |
| smtp2go.com | #12,274 | Bootstrap, Cloudflare Bot Management, Cloudflare edge/CDN + 11 more | Find emails |
| egihosting.com | #12,285 | Let's Encrypt, Nginx, WordPress + 3 more | Find emails |
| mynewsdesk.com | #12,381 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 11 more | Find emails |
| popcash.net | #12,385 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 17 more | Find emails |
| carnegieendowment.org | #12,434 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 7 more | Find emails |
| whc.ca | #12,439 | Bootstrap, ClickCease, Cloudflare + 22 more | Find emails |
| altium.com | #12,486 | AddToAny, Amazon (ACM), Amazon CloudFront + 34 more | Find emails |
| idexx.com | #12,728 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 23 more | Find emails |
| xmission.com | #12,746 | Bluesky, Bootstrap, DigiCert + 11 more | Find emails |
| ottera.tv | #12,764 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| above.com | #12,934 | AddToAny, Apache, Bootstrap + 15 more | Find emails |
| england.nhs.uk | #12,946 | Amazon (ACM), Amazon CloudFront, Civic Cookie Control + 8 more | Find emails |
| michaelkors.com | #12,976 | Adobe Experience Cloud (Launch), Adobe Fonts (Typekit), Akamai Bot Manager + 16 more | Find emails |
| resy.com | #13,037 | Amazon Route 53, DigiCert, Imperva + 3 more | Find emails |
| ynetnews.com | #13,117 | Akamai Edge DNS, Chartbeat, Cloudflare edge/CDN + 10 more | Find emails |
| nanosystems.com | #13,170 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| zahid.host | #13,210 | Django, Google Analytics, Google Tag Manager + 5 more | Find emails |
| rumahweb.com | #13,269 | Cloudflare, Cloudflare edge/CDN, DoubleClick (Google Ads) + 9 more | Find emails |
| pushy.me | #13,403 | Amazon (ACM), Amazon Route 53, Bootstrap + 12 more | Find emails |
| dandb.com | #13,413 | Akamai mPulse, Amazon Route 53, Cloudflare Bot Management + 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 →