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 |
|---|---|---|---|
| governmentjobs.com | #12,754 | ASP.NET, AddThis, Amazon Route 53 + 10 more | Find emails |
| ottera.tv | #12,764 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| spectrumvoip.com | #12,782 | AWS Lambda, Amazon CloudFront, Atlassian Cloud + 21 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| sharefile.com | #12,791 | Adyen, Amazon Route 53, Azure API Management + 18 more | Find emails |
| croc.ru | #12,795 | Bitrix, Google Fonts, Google Tag Manager + 8 more | Find emails |
| societe.com | #12,796 | AWS Lambda, Brevo, Calendly + 12 more | Find emails |
| control-webpanel.com | #12,797 | Bootstrap, Font Awesome, Google Analytics + 9 more | Find emails |
| irishexaminer.com | #12,808 | Bootstrap, Chartbeat, Cloudflare + 17 more | Find emails |
| glosbe.com | #12,816 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 5 more | Find emails |
| constellix.net | #12,868 | Adobe Experience Cloud (Launch), DigiCert, Fastly + 8 more | Find emails |
| care.com | #12,872 | Akamai Edge DNS, Akamai edge/CDN, Akamai mPulse + 16 more | Find emails |
| 101domain.com | #12,911 | Cloudflare, Cloudflare Stream, Cloudflare Web Analytics + 6 more | Find emails |
| manyvids.com | #12,921 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| megogo.net | #12,928 | DigiCert, Gemius, Google Analytics + 4 more | Find emails |
| above.com | #12,934 | AddToAny, Apache, Bootstrap + 15 more | Find emails |
| england.nhs.uk | #12,946 | Amazon (ACM), Amazon CloudFront, Civic Cookie Control + 8 more | Find emails |
| flourish.studio | #12,952 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 12 more | Find emails |
| devpost.com | #12,959 | AWS Lambda, Cloudflare edge/CDN, Font Awesome + 18 more | Find emails |
| remax.com | #12,970 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 20 more | Find emails |
| michaelkors.com | #12,976 | Adobe Experience Cloud (Launch), Adobe Fonts (Typekit), Akamai Bot Manager + 16 more | Find emails |
| stltoday.com | #12,984 | Bluesky, DoubleClick (Google Ads), Font Awesome + 14 more | Find emails |
| simpleflying.com | #13,007 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| moneris.com | #13,033 | Akamai Edge DNS, Amazon CloudFront, Atlassian Cloud + 21 more | Find emails |
| ipip.net | #13,035 | Baidu Analytics, Bootstrap, Cloudflare edge/CDN + 5 more | Find emails |
| resy.com | #13,037 | Amazon Route 53, DigiCert, Imperva + 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 →