# What does Viessmann (Schweiz) GmbH use?

Viessmann (Schweiz) GmbH (viessmann.ch) shows public evidence of 9 tools, according to runsonwhat (last checked 2026-10-28).

- Based in: Switzerland
- LinkedIn: https://www.linkedin.com/company/viessmannclimatesolutions

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Fastly](https://www.runsonwhat.com/reverse/fastly) | CDN & Edge | Website code |  |
| [Akamai](https://www.runsonwhat.com/reverse/akamai) | CDN & Edge | Custom domain |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Tag Manager](https://www.runsonwhat.com/reverse/gtm) | Analytics | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Meta Pixel](https://www.runsonwhat.com/reverse/meta-pixel) | Ads & Pixels | DNS verification records |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records |  |
| [Proofpoint](https://www.runsonwhat.com/reverse/proofpoint) | Security & Compliance | Email records |  |
| [Mailjet](https://www.runsonwhat.com/reverse/mailjet) | Email Delivery | Email records |  |
| [Usercentrics](https://www.runsonwhat.com/reverse/usercentrics) | Security & Compliance | Website code |  |

## FAQ

### What tools does Viessmann (Schweiz) use?

As of October 2026, runsonwhat has found 9 tools at Viessmann (Schweiz) (viessmann.ch) in public records. Edge & Hosting: Fastly and Akamai. Data & Observability: Google Tag Manager. Go-to-market: Meta Pixel. Company Ops: Microsoft 365, Proofpoint and Mailjet. Last checked October 28, 2026.

### What email provider does Viessmann (Schweiz) use?

Viessmann (Schweiz) uses Microsoft 365 for email and office software, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 716,227 companies runsonwhat tracks.

### What analytics tools does Viessmann (Schweiz) use?

Viessmann (Schweiz) uses Google Tag Manager for analytics, according to runsonwhat (October 2026). runsonwhat found Google Tag Manager through Google Tag Manager code on viessmann.ch. Google Tag Manager is used by 511,211 companies runsonwhat tracks.

### Does Viessmann (Schweiz) use Meta Pixel?

Yes. runsonwhat found Meta Pixel at Viessmann (Schweiz) through a DNS verification record for Meta Pixel. Meta Pixel is a Ads & Pixels tool used by 414,280 companies runsonwhat tracks.

### How does runsonwhat know what Viessmann (Schweiz) uses?

runsonwhat reads public records only. Of the 9 tools at Viessmann (Schweiz), 3 were found through DNS records, 3 through code on viessmann.ch, 2 through email records and 1 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and viessmann.ch about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/viessmann.ch (updated October 2026). Counts are companies with direct public evidence of the tool (DNS records, certificates, website code, a real-browser crawl, subprocessor lists), so they are lower bounds. Methodology: https://www.runsonwhat.com/methodology.