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 |
|---|---|---|---|
| autosupermarket.it | #50,876 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 10 more | Find emails |
| crocweb.com | #50,886 | Font Awesome, Google Analytics, Google Tag Manager + 11 more | Find emails |
| pcusa.org | #50,887 | Adobe Fonts (Typekit), Algolia, Cloudflare + 11 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| naturallife.com | #50,897 | Adobe Fonts, Adobe Fonts (Typekit), Amazon Route 53 + 10 more | Find emails |
| greatcall.com | #50,907 | Amazon Route 53, Bazaarvoice, Cloudflare edge/CDN + 7 more | Find emails |
| fogbugz.com | #50,928 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 16 more | Find emails |
| saytechnologies.com | #50,935 | AWS Lambda, Amazon Route 53, Cloudflare edge/CDN + 13 more | Find emails |
| trabalhabrasil.com.br | #50,944 | ASP.NET, Amazon Route 53, Bootstrap + 9 more | Find emails |
| stephenking.com | #50,953 | Bootstrap, Cloudflare, Font Awesome + 11 more | Find emails |
| bper.it | #50,962 | Apache, Bootstrap, DataTables + 7 more | Find emails |
| primevox.net | #50,981 | AWS Lambda, AudioEye, Cloudflare + 15 more | Find emails |
| worldcubeassociation.org | #51,001 | Amazon (ACM), Amazon Route 53, ConsentMo + 10 more | Find emails |
| databox.com | #51,002 | ChatGPT Ads Pixel, Cloudflare, Google Fonts + 12 more | Find emails |
| prismahealth.org | #51,014 | ASP.NET, Adobe Fonts (Typekit), Amazon CloudFront + 17 more | Find emails |
| vitkac.com | #51,018 | Cloudflare, Cloudflare edge/CDN, Google Ads Conversion + 6 more | Find emails |
| atariage.com | #51,019 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 4 more | Find emails |
| baucenter.ru | #51,021 | DDoS-Guard, Diginetica, Next.js + 2 more | Find emails |
| ivd.ru | #51,025 | Let's Encrypt, Nginx, Pinterest Widgets + 7 more | Find emails |
| disturbia.co.uk | #51,043 | Bugsnag, Cloudflare, Cloudflare edge/CDN + 10 more | Find emails |
| podcast.app | #51,055 | Algolia, Bugsnag, Cloudflare + 14 more | Find emails |
| e-junkie.com | #51,065 | Amazon (ACM), Amazon Route 53, Apache + 13 more | Find emails |
| domishko.ru | #51,085 | Bootstrap, Font Awesome, JivoChat + 7 more | Find emails |
| slowfood.com | #51,094 | AddToAny, Cloudflare, Cloudflare edge/CDN + 16 more | Find emails |
| sport.ru | #51,098 | Let's Encrypt, LiveInternet (Yadro), Nginx + 3 more | Find emails |
| ringba.com | #51,102 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 25 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 →