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 |
|---|---|---|---|
| fieldgulls.com | #98,297 | Amazon Advertising, Amazon Route 53, DoubleClick (Google Ads) + 14 more | Find emails |
| groupeseb.com | #98,302 | Cloudflare edge/CDN, Drupal, Google Tag Manager + 5 more | Find emails |
| sjc.sp.gov.br | #98,316 | ASP.NET, Bootstrap, Font Awesome + 7 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| vandale.nl | #98,322 | Amazon Route 53, Cloudflare edge/CDN, Google Tag Manager + 7 more | Find emails |
| adxfactory.com | #98,369 | Apache, Bootstrap, Express + 5 more | Find emails |
| poprtb.com | #98,370 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 8 more | Find emails |
| pingler.com | #98,376 | Bootstrap, Cloudflare, Google Fonts + 11 more | Find emails |
| exmasters.com | #98,377 | Apache, Google Ads Conversion, Google Analytics + 9 more | Find emails |
| sendsafely.com | #98,380 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 26 more | Find emails |
| blipfoto.com | #98,382 | Amazon (ACM), Amazon Route 53, Apache + 5 more | Find emails |
| r2b2.io | #98,389 | Apache, Google Tag Manager, Google Workspace + 8 more | Find emails |
| bosx.net | #98,447 | Cloudflare, Google Fonts, Let's Encrypt + 2 more | Find emails |
| gardensbythebay.com.sg | #98,459 | Amazon (ACM), Amazon CloudFront, Apache + 11 more | Find emails |
| hospedameusite.com.br | #98,491 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 13 more | Find emails |
| silverandblackpride.com | #98,492 | Amazon Advertising, Amazon Route 53, DoubleClick (Google Ads) + 14 more | Find emails |
| faridagupta.com | #98,505 | Adobe Fonts (Typekit), Amazon Route 53, Cloudflare edge/CDN + 4 more | Find emails |
| visteon.com | #98,524 | ASP.NET, Cloudflare edge/CDN, Google Fonts + 6 more | Find emails |
| thesportster.com | #98,556 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| otto.market | #98,567 | DigiCert, DoubleClick (Google Ads), Google Analytics + 6 more | Find emails |
| claranetsoho.co.uk | #98,619 | Adobe Fonts (Typekit), CookieFirst, Drupal + 4 more | Find emails |
| layoffs.fyi | #98,633 | Apache, Font Awesome, Google Analytics + 6 more | Find emails |
| colorzilla.com | #98,665 | Google Analytics, Let's Encrypt, Netlify + 1 more | Find emails |
| telbo.com | #98,737 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| genialokal.de | #98,748 | Amazon Route 53, Awin, DoubleClick (Google Ads) + 12 more | Find emails |
| boh.com | #98,751 | Adobe Experience Cloud (Launch), Adobe Fonts (Typekit), Azure API Management + 5 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 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →