CAPTCHA & Bot Protection
90,376 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9%). 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 |
|---|---|---|---|
| indiaforums.com | #31,676 | ASP.NET, Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| teamtreehouse.com | #31,677 | Amazon (ACM), Amazon Route 53, Bugsnag + 22 more | Find emails |
| thespec.com | #31,698 | Amazon Advertising, Amazon Route 53, DoubleClick (Google Ads) + 10 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| skillbox.ru | #31,723 | Google Tag Manager, Let's Encrypt, Nuxt.js + 3 more | Find emails |
| featurebase.app | #31,724 | Algolia, Cloudflare, Cloudflare Stream + 21 more | Find emails |
| 7gra.us | #31,726 | Amazon Route 53, Let's Encrypt, Nginx + 2 more | Find emails |
| aacap.org | #31,741 | ASP.NET, Adobe Fonts (Typekit), Google Ads Conversion + 9 more | Find emails |
| tuko.co.ke | #31,756 | Amazon (ACM), Amazon CloudFront, Cloudflare + 5 more | Find emails |
| nixihost.com | #31,768 | Cloudflare, Cloudflare Turnstile, Cloudflare Web Analytics + 12 more | Find emails |
| pwc.de | #31,776 | Adobe Experience Cloud (Launch), Akamai Bot Manager, Akamai edge/CDN + 11 more | Find emails |
| simdif.com | #31,791 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| nmugroup.se | #31,806 | Apache, Google Analytics, Google Site Kit + 5 more | Find emails |
| nyp.org | #31,821 | Amazon CloudFront, Cloudflare Web Analytics, Cloudflare edge/CDN + 12 more | Find emails |
| canspace.ca | #31,868 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 13 more | Find emails |
| min.io | #31,875 | AWS Lambda, Cloudflare edge/CDN, Google Analytics + 6 more | Find emails |
| redflagdeals.com | #31,882 | Amazon Advertising, DoubleClick (Google Ads), Fastly + 13 more | Find emails |
| warriorforum.com | #31,885 | Amazon (ACM), Amazon Route 53, Nginx | Find emails |
| adtarget.market | #31,894 | Bootstrap, Cloudflare, Font Awesome + 6 more | Find emails |
| teradata.com | #31,961 | Akamai Edge DNS, Azure API Management, Azure Front Door + 9 more | Find emails |
| copyleaks.com | #31,971 | Adobe Fonts (Typekit), Adyen, Brightcove + 29 more | Find emails |
| zulily.com | #31,973 | Braze, Cloudflare edge/CDN, Google Tag Manager + 8 more | Find emails |
| radio.co | #31,990 | AWS Lambda, Cloudflare edge/CDN, Google Fonts + 10 more | Find emails |
| trybooking.com | #31,997 | AOS, Adobe Fonts (Typekit), Amazon (ACM) + 16 more | Find emails |
| faithlife.com | #32,014 | ASP.NET, Amazon Route 53, Amplitude + 18 more | Find emails |
| anntaylor.com | #32,018 | Adobe Experience Cloud (Launch), Bread Financial (Comenity), CSC (Digital Brand Services) + 9 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-2026-08-24-full), snapshot August 24, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →