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 |
|---|---|---|---|
| osgeo.org | #33,194 | AddThis, Cloudflare, Google Hosted Libraries + 6 more | Find emails |
| stanfordhealthcare.org | #33,203 | Adobe Experience Cloud (Launch), Amazon (ACM), Amazon CloudFront + 14 more | Find emails |
| chita.ru | #33,228 | DDoS-Guard, Let's Encrypt | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| archello.com |
| #33,249 |
| Cloudflare, Cloudflare edge/CDN, Google Analytics + 9 more |
| Find emails |
| silverchair.com | #33,255 | Adobe Fonts (Typekit), Amazon Route 53, Cloudflare Bot Management + 10 more | Find emails |
| rsi.ch | #33,295 | Amazon Route 53, DigiCert, Microsoft 365 + 5 more | Find emails |
| gardena.com | #33,317 | AdRoll, Amazon Advertising, CSC (Digital Brand Services) + 21 more | Find emails |
| rchsd.org | #33,332 | BugHerd, Fancybox, Google Fonts + 9 more | Find emails |
| tasty.co | #33,343 | Amazon Advertising, Amazon Route 53, DoubleClick (Google Ads) + 8 more | Find emails |
| hozzt.com | #33,371 | Apache, Bootstrap, Font Awesome + 9 more | Find emails |
| bostondynamics.com | #33,376 | Adyen, Brightcove, Cloudflare Bot Management + 26 more | Find emails |
| lightricks.com | #33,400 | AWS Lambda, Amazon Route 53, Cloudflare edge/CDN + 14 more | Find emails |
| storyblocks.com | #33,410 | Amazon (ACM), Amazon Route 53, Builder.io + 9 more | Find emails |
| ip-home.net | #33,418 | Bootstrap, Font Awesome, Nginx + 5 more | Find emails |
| escalax.io | #33,427 | Google Tag Manager, Nginx, Nuxt.js + 3 more | Find emails |
| financial-ombudsman.org.uk | #33,462 | Azure Front Door, Cloudflare edge/CDN, DigiCert + 8 more | Find emails |
| mediaxchange.co | #33,474 | Apache, Bootstrap, Express + 10 more | Find emails |
| newser.com | #33,485 | ASP.NET, Azure DNS, Azure Front Door + 12 more | Find emails |
| serveris.lv | #33,507 | Apache, DigiCert, Google Analytics + 5 more | Find emails |
| tiobe.com | #33,510 | Apache, Cookiebot, Google Fonts + 10 more | Find emails |
| atresplayer.com | #33,515 | Amazon Advertising, Amazon Route 53, Didomi + 7 more | Find emails |
| fiber.net | #33,535 | Apache, Chartbeat, DoubleClick (Google Ads) + 13 more | Find emails |
| reportlinker.com | #33,549 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 16 more | Find emails |
| flo.com.tr | #33,556 | Google Cloud DNS, Microsoft 365, reCAPTCHA Enterprise + 1 more | Find emails |
| yesware.com | #33,557 | AWS Lambda, Amazon Route 53, Cloudflare edge/CDN + 19 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 →