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 |
|---|---|---|---|
| ning.com | #3,199 | Amazon Route 53, Cloudflare Turnstile, Font Awesome + 13 more | Find emails |
| myanimelist.net | #3,219 | Akamai Edge DNS, Blockthrough, DigiCert + 3 more | Find emails |
| isc.org | #3,241 | Apache, Azure API Management, Bootstrap + 19 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| threatlocker.com |
| #3,255 |
| AWS Lambda, Adobe Fonts (Typekit), Amazon Route 53 + 18 more |
| Find emails |
| usp.br | #3,264 | Apache, Cloudflare Turnstile, Font Awesome + 6 more | Find emails |
| ifood.com.br | #3,321 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 12 more | Find emails |
| ucoz.ru | #3,327 | Bootstrap, CleanTalk, Font Awesome + 8 more | Find emails |
| 4shared.com | #3,340 | Bootstrap, Google Analytics, Google Fonts + 7 more | Find emails |
| salon.com | #3,342 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| postman.com | #3,357 | Amazon CloudFront, Amazon Route 53, Amazon S3 + 30 more | Find emails |
| rocketmoney.dev | #3,401 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 3 more | Find emails |
| thefreedictionary.com | #3,437 | ASP.NET, Cloudflare, Cloudflare edge/CDN + 6 more | Find emails |
| urbandictionary.com | #3,441 | Amazon Route 53, Bunny CDN, BunnyCDN + 11 more | Find emails |
| seek.com.au | #3,456 | Adobe Target, Adyen, Amazon Route 53 + 20 more | Find emails |
| standard.co.uk | #3,479 | Amazon Advertising, Cloudflare, Cloudflare Bot Management + 6 more | Find emails |
| cvent.com | #3,511 | 6sense, Adobe Experience Cloud (Launch), Amazon (ACM) + 22 more | Find emails |
| heyzine.com | #3,513 | Apache, Cloudflare, Google Identity Services + 2 more | Find emails |
| stspg-customer.com | #3,535 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 5 more | Find emails |
| sprinthost.ru | #3,564 | Bootstrap, Font Awesome, JivoChat + 5 more | Find emails |
| over-blog.com | #3,662 | Didomi, Google Analytics, Google Tag Manager + 5 more | Find emails |
| osha.gov | #3,670 | Akamai Edge DNS, Amazon (ACM), Amazon CloudFront + 10 more | Find emails |
| toyota.com | #3,704 | Adobe Audience Manager, Adobe Experience Manager Edge Delivery (Helix RUM), Adobe Target + 12 more | Find emails |
| howtogeek.com | #3,719 | Google Analytics, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| celtra.com | #3,729 | AOS, Amazon Route 53, Cloudflare Bot Management + 8 more | Find emails |
| alltel24.ru | #3,746 | Gatsby, Let's Encrypt, Nginx + 1 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 →