What powers 
viessmann.hu?
Last seen Sep 2026 · 12 technologies across 9 categories
Analytics
Google Analytics
since Jan 2019
Matomo Analytics
since Nov 2024
CMS
Adobe Experience Manager
since Jan 2019
Cookie compliance
Usercentrics
since Aug 2021
Google Workspace
since Oct 2023
Mailjet
since Aug 2025
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
PWA
since Dec 2023
Programming languages
Java
since Jan 2019
Security
HSTS
since Sep 2022
Tag managers
Google Tag Manager
since Jan 2019
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 found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 62% phone
- 38% desktop
Hungary
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.56 / 10 · ranked #834,483 of all domains
46 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.2 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Hungarian
- CDN: Akamai
- Weight: 6.3 MB · 50 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Cloudflare (104.18.32.73, IPv6)
- DNS: carrier.com
- Email: Google Workspace
- Email security: SPF (hard fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 16,316,544, 2 hosts
- Verified with: Google, Microsoft 365
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped core-js Jul 2026
- dropped Microsoft Advertising Jul 2026
- detected Google Tag Manager Mar 2026