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 |
|---|---|---|---|
| bambuser.com | #6,513 | AWS Lambda, Algolia, Amazon (ACM) + 17 more | Find emails |
| brightside.me | #6,524 | Amazon Advertising, Amazon Route 53, DoubleClick (Google Ads) + 9 more | Find emails |
| kidshealth.org | #6,526 | Adobe Experience Cloud (Launch), CSC (Digital Brand Services), Fastly + 9 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| freeconvert.com | #6,548 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 2 more | Find emails |
| infor.pl | #6,553 | DoubleClick (Google Ads), Gemius, Google Publisher Tag + 4 more | Find emails |
| military.com | #6,566 | Amazon Route 53, Google Analytics, Google Tag Manager + 6 more | Find emails |
| getpublica.com | #6,603 | AWS Lambda, Amazon CloudFront, Amazon Route 53 + 15 more | Find emails |
| amtrak.com | #6,615 | Adobe Experience Cloud (Launch), Akamai Bot Manager, Akamai Edge DNS + 9 more | Find emails |
| login.gov | #6,620 | Amazon CloudFront, Amazon Route 53, Amazon S3 + 12 more | Find emails |
| twitcasting.tv | #6,660 | Apache, DigiCert, Google Tag Manager + 2 more | Find emails |
| arvixe.com | #6,682 | Adobe Experience Cloud (Launch), Cloudflare, Cloudflare Bot Management + 9 more | Find emails |
| barchart.com | #6,686 | AWS Lambda, Amazon (ACM), Amazon CloudFront + 12 more | Find emails |
| haisoft.net | #6,695 | Apache, Bootstrap, Font Awesome + 7 more | Find emails |
| vodafone.pt | #6,710 | Citrix NetScaler, Cludo, DigiCert + 5 more | Find emails |
| chunichi.co.jp | #6,713 | Adingo, Amazon Route 53, Apache + 8 more | Find emails |
| tucows.com | #6,717 | AWS Lambda, Cloudflare edge/CDN, Google Analytics + 11 more | Find emails |
| noip.com | #6,719 | Cloudflare edge/CDN, DigiCert, FirstPromoter + 18 more | Find emails |
| alison.com | #6,724 | Cloudflare, Cloudflare Bot Management, Cloudflare Web Analytics + 24 more | Find emails |
| callofduty.com | #6,725 | Adobe Experience Cloud (Launch), Akamai Bot Manager, Akamai Edge DNS + 13 more | Find emails |
| scotsman.com | #6,750 | Cloudflare Bot Management, Cloudflare edge/CDN, Dotmetrics + 10 more | Find emails |
| travian.com | #6,753 | Amazon Route 53, Consentmanager.net, Google Tag Manager + 4 more | Find emails |
| arena.ai | #6,769 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 8 more | Find emails |
| nykaa.com | #6,775 | Adobe Advertising Cloud, Adobe Analytics, Adobe Audience Manager + 19 more | Find emails |
| dm.de | #6,777 | Let's Encrypt, reCAPTCHA Enterprise | Find emails |
| ajax.systems | #6,779 | Amazon (ACM), Amazon CloudFront, Cloudflare + 7 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 →