What powers 21-school.ru?
Last seen Jun 2026 · 64 technologies across 24 categories
A/B Testing
Google Optimize
since Jul 2021
Advertising
AdRiver
since Mar 2023
Analytics
Google Analytics
since Jan 2019
Matomo Analytics
since May 2023
Roistat
since Aug 2024
Snowplow Analytics
since Nov 2022
TikTok Pixel
since Oct 2021
VK Pixel
since Nov 2021
Yandex.Metrika
since May 2019
CDN
CMS
Tilda
since Jan 2019
Databases
MongoDB
since May 2023
Mailjet
since Aug 2022
Font scripts
Google Font API
since Dec 2021
Issue trackers
JavaScript frameworks
Emotion
since Nov 2022
Handlebars
since May 2023
JSS
since Aug 2022
Next.js App Router
since Oct 2025
React
since Sep 2021
Vue.js
since Dec 2022
JavaScript Libraries
Marketing automation
Mautic
since Jan 2024
Miscellaneous
Gravatar
since May 2023
Open Graph
since Sep 2022
PWA
since Aug 2022
Swiper Slider
since Dec 2021
Webpack
since Dec 2022
Performance
Priority Hints
since Oct 2025
Programming languages
Reverse proxies
Envoy
since Aug 2022
Rich text editors
Monaco Editor
since Dec 2022
Security
Cloudflare Bot Management
since Oct 2025
DDoS-Guard
since Oct 2023
hCaptcha
since Oct 2025
HSTS
since Sep 2022
Tag managers
Google Tag Manager
since Jan 2019
UI frameworks
Ant Design
since Oct 2025
Tailwind CSS
since Apr 2024
Video players
Plyr
since Nov 2024
Web frameworks
Ruby on Rails
since Jan 2019
Web servers
Widgets
Facebook
since Jan 2019
Audience
- 89% desktop
- 11% phone
Russia
Germany
Netherlands
Sweden
Finland
Uzbekistan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
4.90 / 10 · ranked #256,777 of all domains
244 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.5 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Russian
- Weight: 1.9 MB · 122 requests
- Structured data: JSON-LD
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.21-school.ru | 27 |
| applicant.21-school.ru | 13 |
| git.21-school.ru | 13 |
| repos.21-school.ru | 13 |
| rocketchat-gtm-misis.21-school.ru | 13 |
| rocketchat-tgu.21-school.ru | 12 |
| start.21-school.ru | 12 |
| supremitism.21-school.ru | 12 |
| 21-school.ru | 11 |
| rocketchat-sechenov.21-school.ru | 11 |
| rocketchat-todogood.21-school.ru | 11 |
| rocketchat-intensive-nov.21-school.ru | 10 |
| rocketchat-intensive-yks.21-school.ru | 10 |
| rocketchat-iteducation.21-school.ru | 10 |
| rocketchat-mgimo.21-school.ru | 10 |
| ai-transform.21-school.ru | 8 |
| event.supremitism.21-school.ru | 8 |
| it-gym.21-school.ru | 8 |
| rocketchat-intensive-kzn.21-school.ru | 8 |
| rocketchat-nn-jun-25.21-school.ru | 8 |
| rocketchat-student.21-school.ru | 8 |
| start-account.21-school.ru | 8 |
| it-marathon.21-school.ru | 7 |
| mephi-ai.21-school.ru | 7 |
Full technology history →
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