CAPTCHA & Bot Protection
91,344 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9.1%). Google's CAPTCHA/bot-scoring widget, the most widely deployed CAPTCHA by far. Detection is homepage-level HTML/header fingerprinting, so a site can run reCAPTCHA on other pages without it showing here.
Other captcha & bot protection
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | snapchat.com | #123 (Tranco) | Find emails |
| 2 | apache.org | #125 (Tranco) | Find emails |
| 3 | one.one | #160 (Tranco) | Find emails |
| 4 | w3.org |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| loopia.com | #25,443 | Bootstrap, DigiCert, Font Awesome + 5 more | Find emails |
| uzaktanegitimkapisi.gov.tr | #25,445 | Bootstrap, DigiCert, Font Awesome + 7 more | Find emails |
| leaseweb.com | #25,463 | Express, Fastly, Font Awesome + 4 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| binary.net | #25,522 | Apache, Bootstrap, Font Awesome + 14 more | Find emails |
| ufile.ca | #25,529 | ASP.NET, Adobe Advertising Cloud, Bootstrap + 16 more | Find emails |
| ccmixter.org | #25,533 | Apache, CKEditor, Google AdSense + 6 more | Find emails |
| fairfaxcounty.gov | #25,542 | ASP.NET, Bootstrap, CrazyEgg + 13 more | Find emails |
| songtexte.com | #25,554 | AWS WAF, Amazon (ACM), Amazon CloudFront + 12 more | Find emails |
| forexby.com | #25,565 | Cloudflare, DMCA.com Protection, Let's Encrypt + 6 more | Find emails |
| raceroster.com | #25,601 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 11 more | Find emails |
| usra.edu | #25,638 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 9 more | Find emails |
| seeklogo.com | #25,667 | ASP.NET, Cloudflare, Cloudflare Web Analytics + 7 more | Find emails |
| aapanel.com | #25,686 | Baidu Analytics, Bootstrap, Cloudflare + 21 more | Find emails |
| cello.so | #25,737 | Amazon CloudFront, Amazon Route 53, Amazon S3 + 16 more | Find emails |
| thg.com | #25,753 | Cloudflare edge/CDN, Fastly, Google Tag Manager + 4 more | Find emails |
| spd.co.il | #25,772 | Cloudflare Bot Management, Cloudflare Turnstile, Cloudflare edge/CDN + 15 more | Find emails |
| experiment.com | #25,779 | Adobe Fonts (Typekit), Cloudflare, Cloudflare edge/CDN + 7 more | Find emails |
| link-host.net | #25,807 | All in One SEO, Bootstrap, Cloudflare + 11 more | Find emails |
| hostek.com | #25,832 | Amazon CloudFront, Atlassian Cloud, Bootstrap + 14 more | Find emails |
| telmex.com | #25,835 | DigiCert, DoubleClick (Google Ads), Google Analytics + 10 more | Find emails |
| recurly.com | #25,844 | Cloudflare edge/CDN, Contentful, DigiCert + 17 more | Find emails |
| roadtrippers.com | #25,848 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 12 more | Find emails |
| garmtech.com | #25,853 | Font Awesome, Google Ads Conversion, Google Analytics + 5 more | Find emails |
| hitappsgames.com | #25,868 | Google AdSense, Let's Encrypt, Lodash + 4 more | Find emails |
| exceedlms.com | #25,904 | AWS Lambda, Adobe Fonts (Typekit), Amazon Route 53 + 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 →