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 |
|---|---|---|---|
| pbase.com | #4,725 | Amazon (ACM), Amazon Route 53, Apache + 1 more | Find emails |
| pubnub.com | #4,772 | Amazon CloudFront, Atlassian Cloud, Atlassian Statuspage + 17 more | Find emails |
| drugs.com | #4,776 | Akamai Bot Manager, Akamai Edge DNS, Akamai edge/CDN + 13 more | Find emails |
| #594 (Tranco) |
| Find emails |
| 5 | cdnvideo.ru | #598 (Tranco) | Find emails |
| directadmin.com |
| #4,862 |
| Bootstrap, Cloudflare, Cloudflare edge/CDN + 11 more |
| Find emails |
| jbhifi.com.au | #4,873 | Amazon Route 53, Cloudflare edge/CDN, Contentful + 12 more | Find emails |
| infobip.com | #4,892 | Amazon CloudFront, Amazon Route 53, Amplitude + 31 more | Find emails |
| overleaf.com | #4,965 | Cloudflare, Google Analytics, Google Tag Manager + 8 more | Find emails |
| cbr.com | #5,007 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| makeuseof.com | #5,093 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| uservoice.com | #5,129 | AWS Lambda, Adobe Fonts (Typekit), Amazon CloudFront + 20 more | Find emails |
| copper6.com | #5,159 | AWS Lambda, Cloudflare edge/CDN, Google Analytics + 7 more | Find emails |
| guzelhosting.com | #5,185 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 9 more | Find emails |
| rainbird.com | #5,282 | AddToAny, Adobe Fonts (Typekit), Amazon CloudFront + 10 more | Find emails |
| dynu.com | #5,317 | ASP.NET, Google Analytics, Google Fonts + 5 more | Find emails |
| indoav.com | #5,341 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| diigo.com | #5,434 | Cloudflare, DigiCert, Express + 10 more | Find emails |
| secondlife.com | #5,444 | AWS Lambda, Akamai Edge DNS, Amplitude + 12 more | Find emails |
| komikindo.ch | #5,488 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 12 more | Find emails |
| lulu.com | #5,490 | Adobe Fonts (Typekit), Cloudflare, Cloudflare edge/CDN + 17 more | Find emails |
| rand.org | #5,511 | Adobe Experience Cloud (Launch), Amazon (ACM), Amazon CloudFront + 11 more | Find emails |
| infura.io | #5,550 | Amazon CloudFront, Amazon Route 53, Atlassian Cloud + 15 more | Find emails |
| paho.org | #5,599 | Bootstrap, DigiCert, Drupal + 10 more | Find emails |
| sgnic.sg | #5,601 | ASP.NET, AddThis, AngularJS + 10 more | Find emails |
| ravelry.com | #5,632 | Atlassian Statuspage, Nginx, Ruby on Rails + 2 more | Find emails |
| yaplakal.com | #5,659 | Cloudflare, Cloudflare Turnstile, Cloudflare edge/CDN + 7 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 →