What powers 
pypsa.org?
Last seen Sep 2026 · 30 technologies across 13 categories
Caching
Varnish
since Aug 2022
CDN
cdnjs
since Oct 2025
Cloudflare
since Jul 2025
Fastly
since Aug 2022
jsDelivr
since Oct 2025
Unpkg
since Oct 2025
Documentation
Font scripts
Font Awesome
since Nov 2025
Google Font API
since Aug 2022
JavaScript frameworks
Svelte
since Oct 2025
JavaScript graphics
JavaScript libraries
Highlight.js
since Oct 2025
Marked
since Oct 2025
Miscellaneous
PaaS
Amazon Web Services
since Nov 2025
GitHub Pages
since Aug 2022
Programming languages
Security
Cloudflare Bot Management
since Nov 2025
HSTS
since Oct 2025
UI frameworks
Radix UI
since Oct 2025
shadcn/ui
since Oct 2025
SvelteKit
since Oct 2025
Tailwind CSS
since Oct 2025
Webmail
Google Workspace
since Nov 2025
Proton Mail
since Jan 2026
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Sep 2026 *: Allowed (was Restricted)
- Sep 2026 *: Restricted (was Allowed)
AI Crawlers
No AI crawlers blocked
Audience
- 78% desktop
- 22% phone
United States
India
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.06 / 10 · ranked #526,915 of all domains
51 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- CDN: Fastly
- Weight: 3.8 MB · 88 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Fastly (185.199.108.153, IPv6)
- DNS: Cloudflare DNS
- Email: Proton Mail
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 1,083,399, 7 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| docs.pypsa.org | 19 |
| pypsa.org | 19 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Proton Mail Jan 2026
- dropped W3.CSS Nov 2025