CAPTCHA & Bot Protection
90,376 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9%). 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 |
|---|---|---|---|
| rusdate.net | #39,100 | Amazon (ACM), Amazon Route 53, Fancybox + 9 more | Find emails |
| roboflow.com | #39,129 | AWS Lambda, Ashby, Calendly + 28 more | Find emails |
| wpopal.com | #39,147 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 11 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| powster.com |
| #39,171 |
| Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 5 more |
| Find emails |
| altn.com | #39,185 | Cloudflare edge/CDN, Google Fonts, Google Tag Manager + 8 more | Find emails |
| stablehost.com | #39,197 | AdRoll, Bootstrap, Cloudflare + 21 more | Find emails |
| internl.net | #39,246 | Adobe Fonts (Typekit), Fancybox, Google Tag Manager + 8 more | Find emails |
| floorplanner.com | #39,284 | Amazon Route 53, Next.js, Sectigo + 3 more | Find emails |
| shiply.com | #39,285 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 3 more | Find emails |
| yarnspirations.com | #39,288 | Amazon Route 53, Bazaarvoice, Cloudflare edge/CDN + 8 more | Find emails |
| csuca.org | #39,293 | Apache, Font Awesome, Google Fonts + 12 more | Find emails |
| informador.mx | #39,294 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 9 more | Find emails |
| cuyahogacounty.gov | #39,305 | AOS, ASP.NET, Bootstrap + 15 more | Find emails |
| skyairline.com | #39,322 | Cloudflare, Cloudflare Bot Management, Cloudflare Web Analytics + 9 more | Find emails |
| searchiq.co | #39,337 | Bootstrap, Cloudflare, Cloudflare Bot Management + 8 more | Find emails |
| snparking.ru | #39,362 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 12 more | Find emails |
| iomart.com | #39,371 | ASP.NET, Cookiebot, DigiCert + 5 more | Find emails |
| ipshu.com | #39,395 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 7 more | Find emails |
| artuk.org | #39,399 | Amazon (ACM), Amazon Route 53, Apache + 7 more | Find emails |
| mla.org | #39,401 | Adobe Fonts (Typekit), Amazon CloudFront, Amazon Route 53 + 5 more | Find emails |
| chrobinson.com | #39,424 | Adobe Experience Cloud (Launch), Cloudflare, Cloudflare Bot Management + 12 more | Find emails |
| rasmussen.edu | #39,436 | Azure API Management, Azure DNS, Cloudflare edge/CDN + 5 more | Find emails |
| summitpost.org | #39,441 | AddToAny, Bootstrap, Cloudflare + 10 more | Find emails |
| kentuckyderby.com | #39,447 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 2 more | Find emails |
| snapar.com | #39,451 | Amazon Route 53, Contentful, DoubleClick (Google Ads) + 17 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-2026-08-24-full), snapshot August 24, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →