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 |
|---|---|---|---|
| bp.com | #6,802 | Amazon CloudFront, Amazon Route 53, Cloudflare + 10 more | Find emails |
| myoffice.ru | #6,804 | AdRiver, Bitrix, Cloudflare + 10 more | Find emails |
| alz.org | #6,810 | ASP.NET, Apache, Azure API Management + 21 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| famousbirthdays.com |
| #6,901 |
| Cloudflare edge/CDN, DoubleClick (Google Ads), Google Publisher Tag + 5 more |
| Find emails |
| dlink.com | #6,905 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 9 more | Find emails |
| zbporn.com | #6,907 | Cloudflare, ExoClick, Google Analytics + 4 more | Find emails |
| f2pool.com | #6,940 | Amazon Route 53, Bootstrap, Cloudflare Bot Management + 10 more | Find emails |
| controlup.com | #6,942 | Amazon CloudFront, Amazon Route 53, Atlassian Cloud + 27 more | Find emails |
| playmogo.com | #6,983 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 11 more | Find emails |
| poringa.net | #7,007 | Amazon (ACM), Cloudflare, Google Analytics + 5 more | Find emails |
| thairath.co.th | #7,027 | Amazon CloudFront, Amazon Route 53, DigiCert + 16 more | Find emails |
| ngrok.com | #7,038 | Amazon CloudFront, Amazon Route 53, Atlassian Cloud + 16 more | Find emails |
| nameshift.com | #7,047 | Astro, Crisp, Fastly + 6 more | Find emails |
| fineartamerica.com | #7,055 | Amazon (ACM), Amazon Route 53, Apache + 7 more | Find emails |
| askfilo.com | #7,063 | Amazon (ACM), Amazon CloudFront, AppsFlyer + 4 more | Find emails |
| control4.com | #7,102 | AWS Lambda, Adobe Fonts (Typekit), Amazon CloudFront + 24 more | Find emails |
| eksisozluk.com | #7,118 | ASP.NET, Bluesky, Cloudflare + 10 more | Find emails |
| unstoppabledomains.com | #7,134 | Fastly, Google Cloud, Google Cloud DNS + 5 more | Find emails |
| bartleby.com | #7,144 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| cmtelematics.com | #7,154 | AOS, Amazon Route 53, Cloudflare Bot Management + 15 more | Find emails |
| no-ip.org | #7,163 | DigiCert, FirstPromoter, Google Fonts + 6 more | Find emails |
| djangoproject.com | #7,165 | Amazon Route 53, Bluesky, Django + 8 more | Find emails |
| sport.de | #7,168 | Adyen, Amazon CloudFront, Awin + 22 more | Find emails |
| tube8.com | #7,171 | Amazon Route 53, DigiCert, DoubleClick (Google Ads) + 4 more | Find emails |
| zerogpt.com | #7,189 | DoubleClick (Google Ads), Google Ads Conversion, Google Analytics + 10 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 →