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 |
|---|---|---|---|
| sololearn.com | #43,281 | Bugsnag, Cloudflare, Cloudflare Bot Management + 5 more | Find emails |
| concur.com | #43,291 | Akamai Edge DNS, Akamai edge/CDN, Akamai mPulse + 10 more | Find emails |
| xrite.com | #43,294 | ASP.NET, Amazon (ACM), Amazon CloudFront + 21 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| burpee.com |
| #43,295 |
| Bazaarvoice, Cloudflare edge/CDN, Let's Encrypt + 3 more |
| Find emails |
| elplural.com | #43,296 | Cloudflare, Let's Encrypt, reCAPTCHA v2 | Find emails |
| nada.org | #43,300 | Amazon Route 53, Drupal, Fastly + 11 more | Find emails |
| bok-sd.com | #43,301 | Nginx, PHP, Sectigo + 3 more | Find emails |
| mycrestron.com | #43,323 | ASP.NET, Azure API Management, DigiCert + 9 more | Find emails |
| wbcsd.org | #43,329 | All in One SEO, Cloudflare Turnstile, Cookiebot + 11 more | Find emails |
| commercetools.com | #43,333 | AWS Lambda, Amazon CloudFront, Amazon Route 53 + 19 more | Find emails |
| aqi.in | #43,336 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 6 more | Find emails |
| notifadz.com | #43,342 | Bootstrap, Chart.js, DataTables + 16 more | Find emails |
| anilibria.tv | #43,346 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 9 more | Find emails |
| navient.com | #43,347 | Adobe Experience Cloud (Launch), Adobe Fonts (Typekit), Amazon CloudFront + 13 more | Find emails |
| workforce.com | #43,367 | Adobe Fonts, Adobe Fonts (Typekit), Amazon Route 53 + 7 more | Find emails |
| eschool.edu.ps | #43,375 | Bootstrap, DigiCert, Font Awesome + 6 more | Find emails |
| ipsharkk.com | #43,391 | Astro, Cloudflare, Cloudflare edge/CDN + 2 more | Find emails |
| xprize.org | #43,429 | ASP.NET, Azure API Management, Bootstrap + 9 more | Find emails |
| sesameworkshop.org | #43,456 | Amazon Route 53, Fastly, Google Tag Manager + 9 more | Find emails |
| katadata.co.id | #43,491 | Adobe Fonts (Typekit), Bootstrap, DoubleClick (Google Ads) + 16 more | Find emails |
| encuentra24.com | #43,499 | AdRoll, Cloudflare, Cloudflare Web Analytics + 22 more | Find emails |
| currentaffairs.org | #43,517 | Adobe Fonts (Typekit), Cloudflare, Cloudflare Bot Management + 15 more | Find emails |
| daijiworld.com | #43,566 | AddThis, Apache, Bootstrap + 15 more | Find emails |
| theses.fr | #43,621 | Apache, CDN Fonts, Google Fonts + 3 more | Find emails |
| sunnah.com | #43,628 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 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 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →