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 |
|---|---|---|---|
| nato.int | #5,205 | Adobe Fonts (Typekit), Akamai Edge DNS, Fastly + 6 more | Find emails |
| temp-mail.org | #5,253 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 8 more | Find emails |
| rainbird.com | #5,282 | AddToAny, Adobe Fonts (Typekit), Amazon CloudFront + 10 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| booth.pm | #5,304 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services + 3 more | Find emails |
| acer.com | #5,305 | ASP.NET, Akamai Bot Manager, Akamai edge/CDN + 11 more | Find emails |
| dynu.com | #5,317 | ASP.NET, Google Analytics, Google Fonts + 5 more | Find emails |
| 247sports.com | #5,322 | Adobe Audience Manager, Adobe Fonts, Adobe Fonts (Typekit) + 28 more | Find emails |
| uconn.edu | #5,324 | Font Awesome, Google Fonts, Google Tag Manager + 5 more | Find emails |
| dndbeyond.com | #5,326 | Amazon Route 53, Amplience, Datadog + 11 more | Find emails |
| indoav.com | #5,341 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| kijiji.ca | #5,396 | DoubleClick (Google Ads), Google AdSense, Google Cloud + 7 more | Find emails |
| scielo.br | #5,413 | AddToAny, Bluesky, Bootstrap + 7 more | Find emails |
| genially.com | #5,429 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 14 more | Find emails |
| diigo.com | #5,434 | Cloudflare, DigiCert, Express + 10 more | Find emails |
| secondlife.com | #5,444 | AWS Lambda, Akamai Edge DNS, Amplitude + 12 more | Find emails |
| tradeinn.com | #5,448 | Fancybox, Google Cloud DNS, Google Fonts + 5 more | Find emails |
| ipsos.com | #5,469 | Bluesky, Cloudflare, Cloudflare Bot Management + 10 more | Find emails |
| braintreegateway.com | #5,481 | Braintree, Cloudflare Bot Management, Cloudflare Web Analytics + 5 more | Find emails |
| komikindo.ch | #5,488 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 12 more | Find emails |
| lulu.com | #5,490 | Adobe Fonts (Typekit), Cloudflare, Cloudflare edge/CDN + 17 more | Find emails |
| geocaching.com | #5,496 | ASP.NET, Azure API Management, Google Fonts + 4 more | Find emails |
| rand.org | #5,511 | Adobe Experience Cloud (Launch), Amazon (ACM), Amazon CloudFront + 11 more | Find emails |
| drift.com | #5,530 | Amazon CloudFront, Amazon Route 53, Amazon S3 + 13 more | Find emails |
| getjobber.com | #5,534 | Amazon Route 53, Astro, CHEQ + 16 more | Find emails |
| infura.io | #5,550 | Amazon CloudFront, Amazon Route 53, Atlassian Cloud + 15 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 →