CAPTCHA & Bot Protection
927 of the 1,000,000 top sites in our Tranco top-1M census run Yandex SmartCaptcha (0.1%). Yandex's CAPTCHA challenge product for filtering bot traffic. Detection is homepage-level HTML/header fingerprinting, so a site can run Yandex SmartCaptcha on other pages without it showing here.
Other captcha & bot protection
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | firstvds.ru | #1,843 (Tranco) | Find emails |
| 2 | nag.ru | #3,951 (Tranco) | Find emails |
| 3 | kommersant.ru | #4,865 (Tranco) | Find emails |
| 4 | punchmedia.ru |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| kasla.ru | #569,227 | Bitrix, DDoS-Guard, Let's Encrypt + 3 more | Find emails |
| ozon-onlinevideo.ru | #569,337 | AOS, Apache, Bootstrap + 6 more | Find emails |
| bochkarev-promo.ru | #569,358 | Let's Encrypt, Nginx, Yandex Metrica | Find emails |
| #6,215 (Tranco) |
| Find emails |
| 5 | irecommend.ru | #6,269 (Tranco) | Find emails |
| z-clinic.ru |
| #569,600 |
| Bitrix, Google AMP, Let's Encrypt + 9 more |
| Find emails |
| lengu.ru | #570,785 | Bootstrap, Font Awesome, Let's Encrypt + 5 more | Find emails |
| marr.ru | #572,409 | Bitrix, JivoChat, Let's Encrypt + 5 more | Find emails |
| hookahhouse.ru | #573,547 | Bitrix, Bootstrap, Let's Encrypt + 6 more | Find emails |
| postlink.ru | #573,886 | AngularJS, Bootstrap, Nginx + 3 more | Find emails |
| fortuna99.ru | #574,818 | ASP.NET, JivoChat, Let's Encrypt + 4 more | Find emails |
| howemine.su | #574,982 | Bootstrap, Cloudflare, DDoS-Guard + 6 more | Find emails |
| rusklad.ru | #575,229 | Bitrix, Bootstrap, Let's Encrypt + 8 more | Find emails |
| avancore.ru | #575,371 | Google Hosted Libraries, Google Maps, Nginx + 4 more | Find emails |
| tp-link.ru | #575,777 | Bitrix, Let's Encrypt, Nginx + 5 more | Find emails |
| toolrise.space | #576,889 | Bootstrap, Cloudflare, DDoS-Guard + 7 more | Find emails |
| wmscelicom.ru | #579,954 | Axios, Fancybox, Google Fonts + 6 more | Find emails |
| savage.ru | #580,525 | Bitrix, Bootstrap, BotFAQtor + 7 more | Find emails |
| sso-mil.ru | #580,728 | Bitrix, Fancybox, Google Fonts + 8 more | Find emails |
| dsm.ru | #581,303 | Bitrix, Nginx, PHP + 4 more | Find emails |
| diferro.ru | #582,814 | Bitrix, Fancybox, Google Fonts + 6 more | Find emails |
| ligarobotov.ru | #582,918 | Font Awesome, Google Fonts, Let's Encrypt + 9 more | Find emails |
| 4-izmerenie.ru | #583,160 | Cloudflare, Font Awesome, Let's Encrypt + 7 more | Find emails |
| bureauveritas.ru | #584,588 | Apache, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| z51.ru | #584,657 | Bootstrap, BotFAQtor, Flocktory + 7 more | Find emails |
| sapland.ru | #586,580 | Apache, Bitrix, Fancybox + 9 more | Find emails |
| uplab.ru | #586,993 | Bitrix, Google Tag Manager, Nginx + 6 more | Find emails |
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 →