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 |
|---|---|---|---|
| uoou.cz | #53,376 | DigiCert, Nginx, reCAPTCHA | Find emails |
| philarchive.org | #53,407 | Bootstrap, Bulma, Cloudflare + 10 more | Find emails |
| cduniverse.com | #53,447 | Cloudflare, Cloudflare edge/CDN, Let's Encrypt + 4 more | Find emails |
| #594 (Tranco) |
| Find emails |
| 5 | cdnvideo.ru | #598 (Tranco) | Find emails |
| nobullproject.com |
| #53,465 |
| Attentive, Cloudflare, Cloudflare Bot Management + 13 more |
| Find emails |
| gelacy.app | #53,484 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 7 more | Find emails |
| tarhely.com | #53,507 | Apache, Bootstrap, DigiCert + 13 more | Find emails |
| wildskirts.com | #53,516 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 4 more | Find emails |
| skima.jp | #53,533 | Bootstrap, Font Awesome, Google Fonts + 11 more | Find emails |
| dext.com | #53,560 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| coffeecup.com | #53,597 | Apache, Cloudflare, Cloudflare Web Analytics + 12 more | Find emails |
| krakenfiles.com | #53,622 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| owlstalk.co.uk | #53,643 | Apache, DoubleClick (Google Ads), Font Awesome + 6 more | Find emails |
| ic.cz | #53,645 | Bootstrap, Font Awesome, Google Analytics + 7 more | Find emails |
| webtekno.com | #53,683 | Cloudflare, Cloudflare edge/CDN, DoubleClick (Google Ads) + 10 more | Find emails |
| pennymac.com | #53,697 | Amazon Route 53, Bootstrap, DigiCert + 22 more | Find emails |
| gsccca.org | #53,728 | ASP.NET, Cloudflare, DigiCert + 8 more | Find emails |
| turkiyeburslari.gov.tr | #53,774 | ASP.NET, Azure API Management, Azure DNS + 9 more | Find emails |
| modirum.com | #53,776 | Google Tag Manager, Icons8, Let's Encrypt + 6 more | Find emails |
| sdi.net.id | #53,777 | AOS, Ahrefs Analytics, Font Awesome + 6 more | Find emails |
| researchr.org | #53,787 | Bootstrap, Google Analytics, Let's Encrypt + 5 more | Find emails |
| edns.de | #53,815 | Apache, DigiCert, Google Fonts + 3 more | Find emails |
| vbox7.com | #53,833 | Bootstrap, DigiCert, DoubleClick (Google Ads) + 10 more | Find emails |
| dreamies.de | #53,868 | Apache, Google Identity Services, Let's Encrypt + 3 more | Find emails |
| shopakira.com | #53,881 | Attentive, Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| adesignaward.com | #53,897 | Apache, Google Fonts, Let's Encrypt + 3 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 →