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 |
|---|---|---|---|
| connpass.com | #42,532 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 12 more | Find emails |
| arbiscan.io | #42,560 | ASP.NET, Bootstrap, Cloudflare + 11 more | Find emails |
| firstinspires.org | #42,579 | ASP.NET, Adyen, Amazon Route 53 + 28 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| partnerstack.com | #42,583 | AWS Lambda, Cloudflare, Cloudflare edge/CDN + 11 more | Find emails |
| beds24.com | #42,613 | Apache, Bootstrap, Chart.js + 16 more | Find emails |
| livesudoku.com | #42,615 | Cloudflare, Cloudflare edge/CDN, Google Identity Services + 3 more | Find emails |
| unpri.org | #42,620 | Adyen, Brightcove, Cloudflare + 17 more | Find emails |
| conad.it | #42,636 | Adobe Experience Cloud (Launch), Azure DNS, DigiCert + 4 more | Find emails |
| trendnet.com | #42,637 | Bootstrap, Font Awesome, Google Ads Conversion + 7 more | Find emails |
| entrykeyid.com | #42,693 | Adobe Experience Cloud (Launch), Amazon (ACM), Amazon CloudFront + 8 more | Find emails |
| agentprocessing.com | #42,707 | Let's Encrypt, Nginx, PHP + 2 more | Find emails |
| virtuagym.com | #42,720 | Adobe Fonts, Adobe Fonts (Typekit), Amazon (ACM) + 8 more | Find emails |
| matrox.com | #42,738 | Bootstrap, Cloudflare, Cloudflare Bot Management + 15 more | Find emails |
| verabradley.com | #42,753 | Adobe Fonts (Typekit), Akamai Edge DNS, Cloudflare edge/CDN + 13 more | Find emails |
| netsample.com | #42,767 | Bootstrap, Font Awesome, Google Fonts + 7 more | Find emails |
| ikentoo.com | #42,774 | Amazon Route 53, Bootstrap, Cloudflare Bot Management + 14 more | Find emails |
| skatteetaten.no | #42,783 | Azure API Management, Cloudflare Bot Management, Cloudflare edge/CDN + 4 more | Find emails |
| mynet.it | #42,809 | ASP.NET, Bootstrap, Fancybox + 5 more | Find emails |
| pportale.pl | #42,815 | Font Awesome, Google Analytics, Google Tag Manager + 7 more | Find emails |
| genious.net | #42,833 | Cloudflare, Drupal, Font Awesome + 10 more | Find emails |
| expedient.com | #42,838 | 6sense, Bootstrap, Chart.js + 14 more | Find emails |
| krautmtrk.com | #42,873 | GoDaddy Website Builder, GoDaddy | Find emails |
| usc.gal | #42,919 | Apache, Drupal, Google Analytics + 6 more | Find emails |
| boconcept.com | #42,962 | Amplience, Cloudflare edge/CDN, Cookie Information + 7 more | Find emails |
| game.es | #42,968 | ASP.NET, ConsentMo, Cookiebot + 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-2026-08-24-full), snapshot August 24, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →