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 |
|---|---|---|---|
| onetrust.com | #610 | 6sense, Adobe Audience Manager, Adobe Experience Cloud (Launch) + 23 more | Find emails |
| fontawesome.com | #626 | Amazon Route 53, BuySellAds, Carbon Ads + 8 more | Find emails |
| independent.co.uk | #636 | Cloudflare, Fastly, Google Workspace + 5 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| outbrain.com | #644 | Adobe Fonts (Typekit), DigiCert, DoubleClick (Google Ads) + 19 more | Find emails |
| ups.com | #658 | Adobe Target, Akamai Bot Manager, Akamai edge/CDN + 5 more | Find emails |
| mediafire.com | #710 | Amplitude, Bootstrap, Cloudflare + 15 more | Find emails |
| uber.com | #737 | ChatGPT Ads Pixel, Cloudflare Bot Management, Cloudflare edge/CDN + 21 more | Find emails |
| python.org | #747 | Amazon CloudFront, Amazon Route 53, Atlassian Cloud + 13 more | Find emails |
| fda.gov | #758 | Akamai Bot Manager, Akamai Edge DNS, Akamai edge/CDN + 10 more | Find emails |
| gumgum.com | #762 | AWS Lambda, Amazon (ACM), Amazon CloudFront + 8 more | Find emails |
| fiverr.com | #769 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 4 more | Find emails |
| kick.com | #777 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 10 more | Find emails |
| apnews.com | #794 | Blockthrough, Cloudflare, Cloudflare Bot Management + 15 more | Find emails |
| no-ip.com | #808 | DigiCert, FirstPromoter, Google Fonts + 6 more | Find emails |
| ddnss.de | #817 | Apache, Bootstrap, Font Awesome + 6 more | Find emails |
| webmd.com | #871 | Adobe Experience Cloud (Launch), Cloudflare, Cloudflare Bot Management + 7 more | Find emails |
| biblegateway.com | #882 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 11 more | Find emails |
| wyzecam.com | #918 | Bazaarvoice, Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| smilewanted.com | #947 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 12 more | Find emails |
| theconversation.com | #971 | Fastly, Google Tag Manager, Let's Encrypt + 6 more | Find emails |
| hugedomains.com | #987 | AOS, ASP.NET, Adobe Fonts (Typekit) + 13 more | Find emails |
| pixiv.net | #988 | Bootstrap, Cloudflare Bot Management, Cloudflare edge/CDN + 9 more | Find emails |
| clever.com | #990 | Adyen, Amazon CloudFront, Amazon Route 53 + 26 more | Find emails |
| nextcloud.com | #1,030 | Apache, Bootstrap, Font Awesome + 7 more | Find emails |
| classlink.com | #1,073 | AWS Lambda, Adobe Fonts (Typekit), Amazon CloudFront + 22 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 →