What powers system4u.cz?
Last seen Jun 2026 · 37 technologies across 14 categories
Analytics
Google Analytics
since Apr 2019
Linkedin Insight Tag
since Jul 2021
Matomo Analytics
since Oct 2021
Microsoft Clarity
since May 2026
CDN
Cloudflare
since Mar 2024
CMS
WordPress
since Apr 2019
Databases
MySQL
since Apr 2019
Font scripts
Typekit
since Feb 2024
JavaScript frameworks
JavaScript libraries
Miscellaneous
Programming languages
PHP
since Apr 2019
Security
Cloudflare Bot Management
since Oct 2024
reCAPTCHA
since Apr 2019
Tag managers
Google Tag Manager
since Apr 2019
Web servers
Webmail
Apple iCloud Mail
since Jan 2023
Microsoft 365
since Aug 2022
WordPress plugins
Audience
Czechia
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.72 / 10 · ranked #2,136,883 of all domains
16 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.7 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 2300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Czech (Czechia)
- Weight: 1.9 MB · 79 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.system4u.cz | 34 |
| epr.system4u.cz | 5 |
Full technology history →
Report an incorrect detection
Recent changes
- detected RankMath SEO Jun 2026
- detected Microsoft Clarity May 2026