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 |
|---|---|---|---|
| transcend.io | #7,259 | Adobe Fonts (Typekit), Amazon CloudFront, Amazon Route 53 + 11 more | Find emails |
| payhip.com | #7,279 | Adobe Fonts (Typekit), Bootstrap, Cloudflare + 17 more | Find emails |
| klevu.com | #7,291 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| mudah.my | #7,303 | Cloudflare, Cloudflare edge/CDN, DebugBear + 14 more | Find emails |
| alchemy.com | #7,324 | Amazon CloudFront, Atlassian Cloud, Atlassian Statuspage + 17 more | Find emails |
| eldebate.com | #7,331 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| t24.com.tr | #7,350 | AOS, Bluesky, Bootstrap + 20 more | Find emails |
| heapanalytics.com | #7,367 | Amazon Route 53, Bizible, Chargebee + 9 more | Find emails |
| nzz.ch | #7,381 | Adobe Audience Manager, Adobe Fonts (Typekit), AppNexus + 14 more | Find emails |
| sejda.com | #7,396 | Cloudflare, Cloudflare Turnstile, Cloudflare edge/CDN + 2 more | Find emails |
| manga18.club | #7,398 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 10 more | Find emails |
| rule34.us | #7,403 | Google Analytics, Google Hosted Libraries, Google Tag Manager + 4 more | Find emails |
| alodokter.com | #7,451 | Akamai Edge DNS, AppsFlyer, Criteo + 11 more | Find emails |
| buyma.com | #7,475 | Amazon Route 53, Apache, Fastly + 11 more | Find emails |
| jfrog.io | #7,490 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 14 more | Find emails |
| slobodnadalmacija.hr | #7,516 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 15 more | Find emails |
| gyazo.com | #7,552 | AOS, Cloudflare, Cloudflare edge/CDN + 12 more | Find emails |
| donedeal.ie | #7,554 | Amazon CloudFront, Cloudflare, Cloudflare edge/CDN + 6 more | Find emails |
| nanit.com | #7,555 | AB Tasty, Amazon Route 53, Attentive + 14 more | Find emails |
| nuget.org | #7,570 | ASP.NET, Azure API Management, Azure DNS + 8 more | Find emails |
| sojern.com | #7,574 | AWS Lambda, Cloudflare edge/CDN, Font Awesome + 10 more | Find emails |
| northwesternmutual.com | #7,592 | Adobe Experience Cloud (Launch), Adobe Fonts (Typekit), Amazon CloudFront + 6 more | Find emails |
| delaware.gov | #7,594 | ASP.NET, AngularJS, Bootstrap + 19 more | Find emails |
| nxp.com | #7,617 | Adobe Experience Cloud (Launch), Akamai edge/CDN, Akamai mPulse + 8 more | Find emails |
| sisal.it | #7,640 | Adobe Experience Cloud (Launch), Akamai Bot Manager, Akamai edge/CDN + 14 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 →