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 |
|---|---|---|---|
| zxyvrtd.com | #13,511 | GoDaddy Website Builder, GoDaddy | Find emails |
| thains.co.th | #13,572 | Apache, Bootstrap, Google Analytics + 6 more | Find emails |
| kinsta.com | #13,584 | Amazon CloudFront, Atlassian Cloud, Atlassian Statuspage + 16 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| domestika.org |
| #13,590 |
| AWS WAF, Amazon (ACM), Amazon CloudFront + 8 more |
| Find emails |
| sensibo.com | #13,621 | Cloudflare edge/CDN, Convert, Google Fonts + 10 more | Find emails |
| nutrition.org | #13,648 | Cloudflare Bot Management, Cloudflare edge/CDN, Foundation + 9 more | Find emails |
| uwm.edu | #13,650 | AddToAny, Adobe Fonts (Typekit), Apache + 14 more | Find emails |
| ably-realtime.com | #13,676 | Cloudflare, Cloudflare edge/CDN, Gatsby + 11 more | Find emails |
| cargill.com | #13,694 | Adobe Experience Cloud (Launch), Akamai edge/CDN, Amazon Route 53 + 16 more | Find emails |
| merck.com | #13,695 | Brightcove, Google Maps, Google Tag Manager + 12 more | Find emails |
| publishersweekly.com | #13,699 | Amazon (ACM), Amazon Route 53, Google Analytics + 13 more | Find emails |
| playblackdesert.com | #13,720 | Amazon Route 53, Cookiebot, Google Tag Manager + 5 more | Find emails |
| nintendolife.com | #13,722 | Amazon Advertising, Bluesky, Cloudflare + 14 more | Find emails |
| dialpad.com | #13,729 | Amazon Route 53, Amplitude, Cloudflare edge/CDN + 13 more | Find emails |
| minne.com | #13,754 | Amazon CloudFront, Amazon Route 53, Google Ads Conversion + 10 more | Find emails |
| smore.com | #13,813 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 16 more | Find emails |
| goodsync.com | #13,821 | Cloudflare Turnstile, Google Tag Manager, Olark + 2 more | Find emails |
| some-tools.com | #13,826 | GoDaddy Website Builder, GoDaddy | Find emails |
| shadowserver.org | #13,848 | Bluesky, Bunny CDN, BunnyCDN + 6 more | Find emails |
| kunasystems.com | #13,849 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 7 more | Find emails |
| unglobalcompact.org | #13,868 | AddToAny, Adyen, Amazon (ACM) + 19 more | Find emails |
| oed.com | #13,881 | Amazon (ACM), Amazon Route 53, Apache + 7 more | Find emails |
| postheaven.net | #13,916 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 3 more | Find emails |
| inkbunny.net | #13,917 | JW Player, Let's Encrypt, Nginx + 2 more | Find emails |
| grammy.com | #13,924 | Adobe Fonts (Typekit), Adyen, Amazon Route 53 + 16 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 →