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 |
|---|---|---|---|
| ably.io | #3,764 | Amazon Route 53, Cloudflare edge/CDN, Gatsby + 11 more | Find emails |
| zerocdn.com | #3,789 | Bootstrap, Django, Let's Encrypt + 4 more | Find emails |
| likee.video | #3,869 | Amazon Route 53, Kong, Nginx + 2 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| screenrant.com |
| #3,882 |
| Google Analytics, Google Tag Manager, Let's Encrypt + 4 more |
| Find emails |
| thestar.com | #3,924 | Amazon Advertising, Amazon Route 53, Blockthrough + 13 more | Find emails |
| opsgenie.com | #3,934 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| apnic.net | #3,967 | Adyen, Brightcove, Cloudflare Bot Management + 26 more | Find emails |
| tunein.com | #3,971 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 8 more | Find emails |
| backblaze.com | #4,025 | AWS Lambda, CHEQ, Cloudflare + 21 more | Find emails |
| ghost.org | #4,058 | Ahrefs Analytics, Chart.js, Cloudflare + 19 more | Find emails |
| redcross.org | #4,067 | Adobe Experience Cloud (Launch), Adobe Experience Manager Edge Delivery (Helix RUM), Akamai edge/CDN + 18 more | Find emails |
| spreaker.com | #4,081 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| tvtropes.org | #4,086 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 4 more | Find emails |
| pa.gov | #4,114 | Adobe Experience Cloud (Launch), Azure Front Door, Bluesky + 9 more | Find emails |
| hyundai.com | #4,128 | Bambuser, Cloudflare Bot Management, Cloudflare edge/CDN + 8 more | Find emails |
| siteground.us | #4,131 | Cookiebot, Google Trust Services, Nginx + 5 more | Find emails |
| dish.com | #4,143 | Adobe Experience Cloud (Launch), Adobe Experience Manager Edge Delivery (Helix RUM), Amazon CloudFront + 7 more | Find emails |
| flipsnack.com | #4,174 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 12 more | Find emails |
| joinhoney.com | #4,195 | DigiCert, Google Cloud DNS, PayPal + 1 more | Find emails |
| boardgamegeek.com | #4,196 | Adobe Fonts, Adobe Fonts (Typekit), Cloudflare + 6 more | Find emails |
| sonicwall.com | #4,222 | Contentstack, Google Tag Manager, HubSpot + 8 more | Find emails |
| serveriai.lt | #4,232 | Cookiebot, Fancybox, Google Ads Conversion + 9 more | Find emails |
| kinghost.com.br | #4,234 | Cloudflare edge/CDN, DigiCert, Google Fonts + 5 more | Find emails |
| mosyle.com | #4,243 | Apache, Google AMP, Google Analytics + 5 more | Find emails |
| af.mil | #4,251 | ASP.NET, Bootstrap, Fancybox + 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 →