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 |
|---|---|---|---|
| gogvo.com | #46,052 | AdRoll, Apache, Bootstrap + 7 more | Find emails |
| printler.com | #46,064 | ASP.NET, Azure API Management, Bootstrap + 17 more | Find emails |
| losango.com.br | #46,093 | Akamai Edge DNS, Apache, Dynatrace + 4 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| sunsky-online.com |
| #46,108 |
| Amazon CloudFront, Bootstrap, Cloudflare + 10 more |
| Find emails |
| deusto.es | #46,123 | Akamai edge/CDN, Apache, Bootstrap + 11 more | Find emails |
| ccrtc.com | #46,141 | Google Fonts, Let's Encrypt, Nginx + 3 more | Find emails |
| hosteltur.com | #46,146 | Amazon CloudFront, Bluesky, DigiCert + 6 more | Find emails |
| houseplans.net | #46,150 | Amazon Pay, Cloudflare, Cloudflare edge/CDN + 12 more | Find emails |
| thumbzilla.com | #46,151 | Amazon Route 53, DoubleClick (Google Ads), Google Analytics + 3 more | Find emails |
| bancobmg.com.br | #46,168 | Adobe Experience Cloud (Launch), Akamai edge/CDN, Akamai mPulse + 18 more | Find emails |
| 59.ru | #46,196 | DDoS-Guard, Let's Encrypt | Find emails |
| vpesports.com | #46,209 | All in One SEO, Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| gradesaver.com | #46,210 | Amazon (ACM), Amazon Advertising, Amazon CloudFront + 15 more | Find emails |
| americanmuscle.com | #46,227 | ASP.NET, Affirm, Cloudflare + 15 more | Find emails |
| lincolnfinancial.com | #46,271 | Akamai edge/CDN, Akamai mPulse, DigiCert + 5 more | Find emails |
| shropshirestar.com | #46,279 | Cloudflare Bot Management, Cloudflare edge/CDN, Dotmetrics + 10 more | Find emails |
| ticketsource.com | #46,290 | Bluesky, Cloudflare, Cloudflare Web Analytics + 12 more | Find emails |
| yay.com | #46,312 | Google Cloud DNS, Google Tag Manager, Next.js + 4 more | Find emails |
| pressofatlanticcity.com | #46,328 | 33Across, Advertising.com, Amazon Advertising + 45 more | Find emails |
| hardforum.com | #46,331 | Cloudflare, Cloudflare edge/CDN, ConsentMo + 4 more | Find emails |
| mergecola.uk | #46,335 | GoDaddy Website Builder, GoDaddy | Find emails |
| fosshub.com | #46,358 | Cloudflare, Cloudflare edge/CDN, Google AdSense + 4 more | Find emails |
| moosend.com | #46,381 | ASP.NET, Amazon Route 53, Bootstrap + 19 more | Find emails |
| realsound.jp | #46,421 | Google Tag Manager, Let's Encrypt, Nginx + 4 more | Find emails |
| oreo.com | #46,422 | Adobe Fonts (Typekit), CSC (Digital Brand Services), Cloudflare edge/CDN + 6 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 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →