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 |
|---|---|---|---|
| krista.ru | #26,324 | Bootstrap, DDoS-Guard, Font Awesome + 6 more | Find emails |
| workwelltech.com | #26,338 | All in One SEO, Amazon Route 53, CrazyEgg + 8 more | Find emails |
| eluniverso.com | #26,358 | Akamai edge/CDN, DoubleClick (Google Ads), Google Analytics + 7 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| idefix.com | #26,384 | Amazon CloudFront, Amazon Route 53, Google Analytics + 9 more | Find emails |
| northdata.com | #26,399 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Trust Services + 6 more | Find emails |
| smallseotools.com | #26,489 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 8 more | Find emails |
| webhostinghub.com | #26,494 | Cloudflare Turnstile, Font Awesome, Google Ads Conversion + 15 more | Find emails |
| thegospelcoalition.org | #26,503 | Adobe Fonts (Typekit), Cloudflare, Cloudflare edge/CDN + 13 more | Find emails |
| johnsoncontrols.com | #26,506 | Akamai edge/CDN, Akamai mPulse, Cloudinary + 13 more | Find emails |
| aast.edu | #26,516 | AOS, Ahrefs Analytics, Azure DNS + 17 more | Find emails |
| metrobyt-mobile.com | #26,517 | Adobe Experience Manager Edge Delivery (Helix RUM), Akamai Bot Manager, Akamai Edge DNS + 6 more | Find emails |
| magzter.com | #26,530 | AppsFlyer, Azure DNS, DigiCert + 10 more | Find emails |
| redstate.com | #26,531 | ASP.NET, Adobe Fonts (Typekit), Amazon Advertising + 19 more | Find emails |
| amnestyusa.org | #26,536 | Cloudflare, Cloudflare edge/CDN, Let's Encrypt + 5 more | Find emails |
| knmi.nl | #26,587 | Amazon (ACM), Amazon CloudFront, Bluesky + 3 more | Find emails |
| workos.com | #26,597 | AWS Lambda, Amazon CloudFront, Astro + 20 more | Find emails |
| nextgov.com | #26,602 | Adobe Fonts (Typekit), Azure DNS, Azure Front Door + 13 more | Find emails |
| stockcharts.com | #26,637 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 18 more | Find emails |
| novelai.net | #26,643 | Cloudflare, Cloudflare edge/CDN, Fastmail + 5 more | Find emails |
| chordie.com | #26,661 | Bootstrap, DigiCert, Google AdSense + 8 more | Find emails |
| rowan.edu | #26,670 | Amazon CloudFront, Apache, BrightEdge + 11 more | Find emails |
| thinglink.com | #26,677 | Ahrefs Analytics, Amazon (ACM), Amazon Route 53 + 16 more | Find emails |
| marykay.com | #26,699 | Amazon Route 53, Cloudflare edge/CDN, Google Fonts + 6 more | Find emails |
| trainingpeaks.com | #26,703 | ASP.NET, Amazon (ACM), Amazon CloudFront + 11 more | Find emails |
| hymnary.org | #26,704 | Blockthrough, Bunny CDN, BunnyCDN + 11 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 →