What powers serlo.org?
Last seen Jun 2026 · 27 technologies across 14 categories
Analytics
Caching
CDN
Cloudflare
since Apr 2018
Google Cloud
since Jul 2018
Issue trackers
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Miscellaneous
HTTP/3
since Sep 2022
Open Graph
since Sep 2022
PWA
since Aug 2022
Webpack
since Jul 2018
webpack-2
since Jun 2018
PaaS
Vercel
since Dec 2020
Programming languages
Node.js
since Dec 2020
Security
HSTS
since Sep 2022
Static site generator
UI frameworks
Webmail
Google Workspace
since Aug 2022
Audience
- 57% phone
- 34% desktop
- 9% tablet
Germany
Austria
Switzerland
Italy
Spain
Mexico
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
6.17 / 10 · ranked #98,960 of all domains
325 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: German
- CDN: Cloudflare
- Weight: 0.3 MB · 37 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| de.serlo.org | 14 |
| www.serlo.org | 13 |
| en.serlo.org | 7 |
| es.serlo.org | 7 |
| ta.serlo.org | 7 |
| mathe-builds.serlo.org | 4 |
Full technology history →
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Recent changes
- dropped Cloudflare Browser Insights Apr 2026
- detected Cloudflare Browser Insights Oct 2025