What powers klett.pl?
Last seen Jun 2026 · 32 technologies across 18 categories
Analytics
CDN
Ecommerce
Cart Functionality
since Mar 2022
Font scripts
Font Awesome
since Nov 2019
Issue trackers
Sentry
since May 2024
JavaScript frameworks
React
since Sep 2021
JavaScript libraries
Live chat
LiveChat
since May 2024
Miscellaneous
Programming languages
PHP
since Jan 2019
Security
HSTS
since May 2024
Surveys
Survicate
since Oct 2024
Tag managers
Google Tag Manager
since Jan 2019
UI frameworks
User onboarding
Appcues
since May 2024
Web frameworks
Laravel
since Sep 2021
Web servers
Apache HTTP Server
since Jan 2023
Widgets
Wheelio
since Sep 2021
Audience
- 60% phone
- 38% desktop
- 2% tablet
Poland
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
3.85 / 10 · ranked #691,080 of all domains
28 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.4 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 1800 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Polish
- Weight: 3.5 MB · 90 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| newsletter.klett.pl | 13 |
| beta.klett.pl | 12 |
| jezykiobce.klett.pl | 12 |
| www.jezykiobce.klett.pl | 12 |
| klett.pl | 11 |
| chmura.klett.pl | 6 |
| diagnoza.klett.pl | 6 |
| testomat.klett.pl | 5 |
| www.chmura.klett.pl | 5 |
| logowanie.e-akademia.klett.pl | 4 |
| baza-wiedzy.klett.pl | 3 |
| e-deklaracje.klett.pl | 3 |
| e-akademia.klett.pl | 1 |
Full technology history →
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Recent changes
- dropped Apple iCloud Mail Jan 2026
- dropped Priority Hints Jan 2026
- dropped Bunny Nov 2025
- dropped Bunny Fonts Nov 2025
- detected Bunny Sep 2025
- detected Bunny Fonts Sep 2025