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 |
|---|---|---|---|
| tcl.com | #10,734 | Bazaarvoice, Cloudflare edge/CDN, DoubleClick (Google Ads) + 6 more | Find emails |
| authorize.net | #10,744 | Akamai Edge DNS, ClickTale (Contentsquare), Cloudflare + 11 more | Find emails |
| idrive.com | #10,772 | Amazon Route 53, ClickTale (Contentsquare), Cloudflare edge/CDN + 15 more | Find emails |
| #594 (Tranco) |
| Find emails |
| 5 | cdnvideo.ru | #598 (Tranco) | Find emails |
| harpercollins.com | #10,795 | Adobe Fonts, Adobe Fonts (Typekit), Attentive + 14 more | Find emails |
| palmonas.com | #10,798 | Amazon Route 53, Cloudflare edge/CDN, Convert + 14 more | Find emails |
| fieltorcedor.com.br | #10,875 | Amazon Route 53, Bootstrap, Django + 6 more | Find emails |
| kmv.ru | #10,893 | Apache, ConsentMo, Font Awesome + 12 more | Find emails |
| regway.com | #10,978 | Apache, Cloudflare, Modernizr + 3 more | Find emails |
| proboards.com | #11,143 | Envoy, Fastly, Google Cloud DNS + 4 more | Find emails |
| ncsl.org | #11,164 | ASP.NET, Adyen, Bootstrap + 25 more | Find emails |
| flagcounter.com | #11,198 | Apache, Let's Encrypt, jQuery + 1 more | Find emails |
| optimumdesk.com | #11,259 | AOS, Cloudflare Bot Management, Cloudflare edge/CDN + 5 more | Find emails |
| azlyrics.com | #11,315 | Bootstrap, Namecheap, Nginx + 4 more | Find emails |
| omni-dex.io | #11,318 | AWS Lambda, Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| mova-tech.com | #11,324 | Alibaba Cloud DNS, Cloudflare edge/CDN, Google Ads Conversion + 9 more | Find emails |
| gkg.net | #11,348 | Font Awesome, Google Analytics, Google Fonts + 5 more | Find emails |
| dualeotruyendb.com | #11,359 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 10 more | Find emails |
| olxlay.com | #11,440 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 15 more | Find emails |
| olxsun.com | #11,442 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 15 more | Find emails |
| linux.org | #11,488 | Ahrefs Analytics, Cloudflare, Cloudflare Web Analytics + 8 more | Find emails |
| myfonts.com | #11,525 | Adobe Experience Cloud (Launch), Cloudflare, Cloudflare Bot Management + 10 more | Find emails |
| olark.com | #11,535 | Cloudflare edge/CDN, ConsentMo, Google Cloud DNS + 7 more | Find emails |
| voipbuster.com | #11,584 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| chipotle.com | #11,630 | Adobe Experience Cloud (Launch), Amazon Route 53, Bootstrap + 18 more | Find emails |
| elte.hu | #11,643 | Apache, ConsentMo, Drupal + 2 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 →