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 |
|---|---|---|---|
| apollohospitals.com | #29,431 | Cloudflare, DigiCert, Drupal + 15 more | Find emails |
| ascio.com | #29,509 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Tag Manager + 10 more | Find emails |
| trend.az | #29,533 | Cloudflare, Cloudflare edge/CDN, CookieYes + 11 more | Find emails |
| #561 (Tranco) |
| Find emails |
| 5 | klaviyo.com | #597 (Tranco) | Find emails |
| hightail.com | #29,550 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 23 more | Find emails |
| zmags.com | #29,580 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 11 more | Find emails |
| broadinstitute.org | #29,756 | ConsentMo, Drupal, Google Cloud DNS + 6 more | Find emails |
| carfax.eu | #29,760 | Adyen, Akamai edge/CDN, Akamai mPulse + 20 more | Find emails |
| dermnetnz.org | #29,918 | Amplitude, Clicky, Cloudflare + 9 more | Find emails |
| merrell.com | #29,991 | Adobe Fonts (Typekit), Amazon Route 53, Bazaarvoice + 15 more | Find emails |
| iq.pl | #30,129 | Bootstrap, DigiCert, Fancybox + 5 more | Find emails |
| winamax.fr | #30,248 | Algolia, Amazon (ACM), Amazon CloudFront + 12 more | Find emails |
| scholasticahq.com | #30,273 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 16 more | Find emails |
| webbyawards.com | #30,318 | AOS, ASP.NET, Adobe Fonts (Typekit) + 28 more | Find emails |
| playmobil.com | #30,351 | Cloudflare edge/CDN, DigiCert, Salesforce Commerce Cloud + 2 more | Find emails |
| biblia.com | #30,418 | Amazon Route 53, Amplitude, Azure API Management + 10 more | Find emails |
| chicagoreader.com | #30,694 | Broadstreet, DoubleClick (Google Ads), Google Publisher Tag + 9 more | Find emails |
| 100sp.ru | #30,861 | Meta Pixel, Nginx, PHP + 5 more | Find emails |
| minnpost.com | #31,077 | DoubleClick (Google Ads), Google Analytics, Google Publisher Tag + 11 more | Find emails |
| liqu.id | #31,170 | Bootstrap, Cloudflare, Google Hosted Libraries + 6 more | Find emails |
| perforce.com | #31,171 | Adyen, Brightcove, Cloudflare + 25 more | Find emails |
| api.org | #31,196 | Adobe Fonts (Typekit), Azure DNS, Azure Front Door + 7 more | Find emails |
| facs.org | #31,198 | ASP.NET, Azure Front Door, DigiCert + 12 more | Find emails |
| responsiveads.com | #31,201 | AWS Lambda, Amazon (ACM), Amazon CloudFront + 32 more | Find emails |
| acsm.org | #31,205 | Adobe Fonts (Typekit), Bootstrap, Cloudflare Bot Management + 14 more | Find emails |
| last-z.com | #31,390 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 4 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 →