What powers grouper.school?
Last seen Sep 2026 · 18 technologies across 12 categories
Analytics
Google Analytics
since Sep 2024
CDN
Google Cloud CDN
since Jul 2026
Development
IaaS
Google Cloud
since Dec 2025
JavaScript frameworks
Live chat
Intercom
since May 2026
Miscellaneous
Performance
Google Cloud Trace
since Dec 2025
Priority Hints
since Sep 2024
Programming languages
Node.js
since Sep 2024
Reverse proxies
Envoy
since Jul 2026
UI frameworks
Tailwind CSS
since Sep 2024
Webmail
Google Workspace
since Sep 2024
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Oct 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Audience
- 89% desktop
- 7% phone
- 4% tablet
United States
Czechia
Germany
Canada
Brazil
United Kingdom
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.10 / 10 · ranked #1,418,511 of all domains
19 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.1 s |
| INP | 325 ms |
| CLS | 0.1 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- CDN: Google
- Weight: 2.4 MB · 142 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Google (35.219.200.11)
- DNS: Google Cloud DNS
- Email: Google Workspace
- Email security: no SPF record, no DMARC record
- SSL: Google Trust Services, RSA 2048, wildcard, expires Dec 2026
- Common Crawl link graph: rank 165,188, 3 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- dropped Sentry Sep 2026
- dropped Firebase Aug 2026
- dropped HSTS Aug 2026
- detected Envoy Jul 2026
- detected Google Cloud Jul 2026
- detected Google Cloud CDN Jul 2026
- detected Google Cloud Trace Jul 2026
- detected Turbopack Jul 2026
- detected Emotion May 2026
- detected Intercom May 2026
- dropped Font Awesome Feb 2026
- dropped Google Cloud Feb 2026
- dropped Google Cloud Trace Feb 2026
- dropped Heap Jan 2026
- detected Google Cloud Dec 2025
- detected Google Cloud Trace Dec 2025