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 |
|---|---|---|---|
| molsoncoors.com | #99,431 | Adobe Experience Cloud (Launch), Adyen, Brightcove + 17 more | Find emails |
| freeadvice.com | #99,432 | All in One SEO, Bootstrap, Cloudflare + 7 more | Find emails |
| smarty.com | #99,438 | Amazon CloudFront, Atlassian Cloud, Atlassian Statuspage + 13 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| kfshrc.edu.sa | #99,453 | ASP.NET, DigiCert, Google Fonts + 3 more | Find emails |
| bulgarihotels.com | #99,459 | Adobe Experience Cloud (Launch), Akamai Edge DNS, Akamai edge/CDN + 8 more | Find emails |
| vennapps.com | #99,465 | AWS Lambda, AdRoll, Amazon CloudFront + 17 more | Find emails |
| resbank.co.za | #99,468 | Google Tag Manager, reCAPTCHA v2, Adobe Experience Manager | Find emails |
| jobeka.com | #99,482 | Cloudflare, Cloudflare edge/CDN, Cookie-Script + 9 more | Find emails |
| sqlbak.com | #99,483 | CDN Fonts, Cloudflare, Font Awesome + 9 more | Find emails |
| rederio.br | #99,509 | Apache, Drupal, Google Analytics + 4 more | Find emails |
| automation.com | #99,512 | AdRoll, Advertising.com, Adyen + 28 more | Find emails |
| desievite.com | #99,526 | ASP.NET, Amazon (ACM), Amazon Route 53 + 13 more | Find emails |
| letsbeco.com | #99,527 | Cloudflare edge/CDN, GoKwik, Google Analytics + 9 more | Find emails |
| oxygenxml.com | #99,547 | 2Checkout, Bluesky, Bootstrap + 11 more | Find emails |
| hausoftools.com | #99,551 | Cloudflare edge/CDN, Google Hosted Libraries, Google Maps + 12 more | Find emails |
| recodestudios.com | #99,569 | Cloudflare edge/CDN, Google Ads Conversion, Google Analytics + 9 more | Find emails |
| hotnessrater.com | #99,572 | ASP.NET, Ahrefs Analytics, Bootstrap + 16 more | Find emails |
| newzenler.com | #99,585 | Amazon CloudFront, Atlassian Cloud, Atlassian Statuspage + 18 more | Find emails |
| siteocity.com | #99,613 | Apache, Bootstrap, Font Awesome + 6 more | Find emails |
| revechat.com | #99,617 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 9 more | Find emails |
| maisonette.com | #99,636 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 5 more | Find emails |
| thetrek.co | #99,645 | AvantLink, Awin, Cloudflare + 14 more | Find emails |
| clouding.io | #99,658 | Cloudflare, Cloudflare Bot Management, Cloudflare Web Analytics + 8 more | Find emails |
| mlada.in | #99,730 | Cloudflare edge/CDN, GoKwik, Google Analytics + 10 more | Find emails |
| veezal.com | #99,862 | Cloudflare edge/CDN, Google Ads Conversion, Google Analytics + 6 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 →