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 |
|---|---|---|---|
| verisk.com | #37,912 | ASP.NET, Adobe Experience Cloud (Launch), Amazon Route 53 + 13 more | Find emails |
| voterrecords.com | #37,947 | ASP.NET, Cloudflare, Cloudflare Web Analytics + 9 more | Find emails |
| bookcrossing.com | #37,969 | ASP.NET, Cloudflare, Cloudflare Bot Management + 10 more | Find emails |
| #594 (Tranco) |
| Find emails |
| 5 | cdnvideo.ru | #598 (Tranco) | Find emails |
| frame.work | #38,009 | Amazon CloudFront, Cloudflare, Cloudflare Bot Management + 20 more | Find emails |
| fanplayr.com | #38,039 | AWS Lambda, Amazon CloudFront, Amazon Route 53 + 15 more | Find emails |
| buyandsellhair.com | #38,044 | AddToAny, Cloudflare, Cloudflare Turnstile + 16 more | Find emails |
| troyhunt.com | #38,071 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 16 more | Find emails |
| rememberthemilk.com | #38,172 | Amazon CloudFront, Amazon Route 53, Atlassian Cloud + 17 more | Find emails |
| contactmusic.com | #38,173 | ASP.NET, Azure API Management, Azure DNS + 8 more | Find emails |
| fluentu.com | #38,202 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 12 more | Find emails |
| sim-networks.com | #38,221 | AOS, Cloudflare Turnstile, Font Awesome + 11 more | Find emails |
| ttarget.ru | #38,223 | Bootstrap, Fancybox, Font Awesome + 11 more | Find emails |
| stardoll.com | #38,246 | Akamai Edge DNS, DigiCert, Google Analytics + 4 more | Find emails |
| matas.dk | #38,298 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 7 more | Find emails |
| iodonna.it | #38,320 | DoubleClick (Google Ads), Fastly, Google Fonts + 17 more | Find emails |
| aapanel.org | #38,348 | Baidu Analytics, Bootstrap, Cloudflare + 15 more | Find emails |
| transtore.app | #38,426 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 7 more | Find emails |
| simplybook.me | #38,503 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 15 more | Find emails |
| technews.tw | #38,550 | Amazon CloudFront, Amazon Route 53, Bootstrap + 11 more | Find emails |
| farmandfleet.com | #38,569 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 2 more | Find emails |
| omeka.net | #38,652 | Amazon Route 53, Apache, Google Fonts + 6 more | Find emails |
| adop.cc | #38,659 | DoubleClick (Google Ads), Font Awesome, Google Analytics + 12 more | Find emails |
| hosting.international | #38,739 | Bootstrap, Font Awesome, Google Analytics + 12 more | Find emails |
| tlauncher.ru | #38,760 | DDoS-Guard, PHP, reCAPTCHA | Find emails |
| hostcreators.sk | #38,836 | Font Awesome, Google Fonts, Google Maps + 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 →