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 |
|---|---|---|---|
| broadinstitute.org | #29,756 | ConsentMo, Drupal, Google Cloud DNS + 6 more | Find emails |
| carfax.eu | #29,760 | Adyen, Akamai edge/CDN, Akamai mPulse + 20 more | Find emails |
| neurips.cc | #29,767 | Apache, Bootstrap, D3.js + 12 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| yapfiles.ru |
| #29,815 |
| Cloudflare, Cloudflare Turnstile, Let's Encrypt + 6 more |
| Find emails |
| ccel.org | #29,816 | Apache, Bootstrap, BunnyCDN + 15 more | Find emails |
| amdm.ru | #29,819 | Cloudflare, Google AdSense, Google Analytics + 7 more | Find emails |
| canadavisa.com | #29,835 | DoubleClick (Google Ads), Font Awesome, Google AdSense + 13 more | Find emails |
| restockrocket.io | #29,842 | AWS Lambda, Calendly, Cloudflare + 14 more | Find emails |
| rapidswitch.com | #29,874 | ASP.NET, DigiCert, Google Tag Manager + 7 more | Find emails |
| runnerspace.com | #29,878 | Brightcove, Cloudflare, Cloudflare edge/CDN + 14 more | Find emails |
| swdns.info | #29,898 | Apache, Bootstrap, Fancybox + 3 more | Find emails |
| dermnetnz.org | #29,918 | Amplitude, Clicky, Cloudflare + 9 more | Find emails |
| tleechreload.org | #29,945 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 2 more | Find emails |
| unict.it | #29,954 | Apache, Drupal, Telegram + 2 more | Find emails |
| smartyads.com | #29,958 | Amplitude, Google Tag Manager, HubSpot + 5 more | Find emails |
| merrell.com | #29,991 | Adobe Fonts (Typekit), Amazon Route 53, Bazaarvoice + 15 more | Find emails |
| brazzersnetwork.com | #30,019 | Amazon Route 53, Google Fonts, Let's Encrypt + 3 more | Find emails |
| archive.vn | #30,062 | Let's Encrypt, Nginx, reCAPTCHA v2 | Find emails |
| lareviewofbooks.org | #30,082 | Axios, Bootstrap, Chartbeat + 14 more | Find emails |
| suremdm.io | #30,104 | Amazon Route 53, Bootstrap, Font Awesome + 6 more | Find emails |
| hostingraja.in | #30,108 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 10 more | Find emails |
| drtuber.com | #30,123 | Cloudflare, Font Awesome, Google Analytics + 4 more | Find emails |
| iq.pl | #30,129 | Bootstrap, DigiCert, Fancybox + 5 more | Find emails |
| myvidster.com | #30,161 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 8 more | Find emails |
| snob.ru | #30,162 | Cloudflare, Express, Google Tag Manager + 3 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 →