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 |
|---|---|---|---|
| wisdomlib.org | #32,147 | Bootstrap, Buy Me a Coffee, Cloudflare + 9 more | Find emails |
| corebridgefinancial.com | #32,152 | ASP.NET, Adobe Experience Cloud (Launch), Amazon CloudFront + 13 more | Find emails |
| nationalcar.com | #32,181 | Adobe Experience Cloud (Launch), Akamai edge/CDN, Akamai mPulse + 6 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| afpm.org | #32,221 | Drupal, Fastly, Font Awesome + 10 more | Find emails |
| mfcr.cz | #32,231 | Azure API Management, Azure Front Door, Cookiebot + 3 more | Find emails |
| optima-telekom.hr | #32,233 | ASP.NET, Cloudflare edge/CDN, Cookiebot + 10 more | Find emails |
| webnode.es | #32,245 | Amazon Route 53, Convert, DoubleClick (Google Ads) + 7 more | Find emails |
| stanley1913.com | #32,247 | AvantLink, Bazaarvoice, Cloudflare edge/CDN + 12 more | Find emails |
| blacksun.ca | #32,252 | Adobe Fonts (Typekit), Apache, DigiCert + 9 more | Find emails |
| uniconsent.com | #32,279 | ChatGPT Ads Pixel, Cloudflare, Cloudflare edge/CDN + 11 more | Find emails |
| brightedge.com | #32,302 | Amazon Route 53, Bootstrap, BrightEdge + 11 more | Find emails |
| rcgroups.com | #32,305 | Amazon Advertising, Fastly, Google AdSense + 15 more | Find emails |
| energysavingtrust.org.uk | #32,309 | BugHerd, Civic Cookie Control, Cloudflare + 24 more | Find emails |
| poipiku.com | #32,320 | Amazon (ACM), Cloudflare, Cloudflare edge/CDN + 11 more | Find emails |
| gethornet.com | #32,340 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 13 more | Find emails |
| valeo.com | #32,372 | Amazon CloudFront, Amazon Route 53, DigiCert + 9 more | Find emails |
| homebank.kz | #32,389 | DigiCert, reCAPTCHA v3 | Find emails |
| innogamescdn.com | #32,391 | Apache, ConsentMo, Fastly + 4 more | Find emails |
| fjallraven.com | #32,392 | Azure API Management, Cloudflare, Cloudflare edge/CDN + 7 more | Find emails |
| acmethemes.com | #32,399 | Cloudflare, Cloudflare Turnstile, Cloudflare Web Analytics + 15 more | Find emails |
| diki.pl | #32,403 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 2 more | Find emails |
| wellnessliving.com | #32,451 | Amazon Route 53, Bootstrap, Fancybox + 9 more | Find emails |
| pubfinity.com | #32,460 | Amazon (ACM), Amazon CloudFront, Font Awesome + 10 more | Find emails |
| sletat.ru | #32,463 | Cloudflare, Next.js, Qrator + 2 more | Find emails |
| isomedia.com | #32,470 | Apache, Google Tag Manager, PHP + 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 →