# What does Ontrex AG use?

Ontrex AG (ontrex.ch) shows public evidence of 7 tools, according to runsonwhat (last checked 2026-11-12).

- Industry: IT Services
- Size: 51–200 employees
- Based in: Brüttisellen, Switzerland
- Founded: 2004
- LinkedIn: https://www.linkedin.com/company/ontrex-ag

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [CleverReach](https://www.runsonwhat.com/reverse/cleverreach) | Marketing | Email records |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | Email records |  |
| [Atlassian](https://www.runsonwhat.com/reverse/atlassian) | Dev Tools | DNS verification records |  |
| [Let's Encrypt](https://www.runsonwhat.com/reverse/letsencrypt) | Security & Compliance | DNS records |  |
| [Sectigo](https://www.runsonwhat.com/reverse/sectigo) | Security & Compliance | DNS records |  |
| [SwissSign](https://www.runsonwhat.com/reverse/swisssign) | Security & Compliance | DNS verification records |  |

## Recent changes at Ontrex AG

- 2026-11-05: started using again [Anthropic](https://www.runsonwhat.com/reverse/anthropic)
- 2026-11-05: started using again [CleverReach](https://www.runsonwhat.com/reverse/cleverreach)
- 2026-11-05: started using again [Atlassian](https://www.runsonwhat.com/reverse/atlassian)
- 2026-11-05: started using again [SwissSign](https://www.runsonwhat.com/reverse/swisssign)
- 2026-10-29: stopped using [SwissSign](https://www.runsonwhat.com/reverse/swisssign)
- 2026-10-29: stopped using [Anthropic](https://www.runsonwhat.com/reverse/anthropic)
- 2026-10-29: stopped using [Atlassian](https://www.runsonwhat.com/reverse/atlassian)
- 2026-10-29: stopped using [CleverReach](https://www.runsonwhat.com/reverse/cleverreach)
- 2026-10-16: started using [Anthropic](https://www.runsonwhat.com/reverse/anthropic)

## FAQ

### What tools does Ontrex use?

As of November 2026, runsonwhat has found 7 tools at Ontrex (ontrex.ch) in public records. Application: Anthropic. Go-to-market: CleverReach. Company Ops: Microsoft 365, Atlassian and Let's Encrypt. Last checked November 12, 2026.

### What email provider does Ontrex use?

Ontrex uses Microsoft 365 for email and office software, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365. Microsoft 365 is used by 736,709 companies runsonwhat tracks.

### What marketing software does Ontrex use?

Ontrex uses CleverReach for marketing, according to runsonwhat (November 2026). runsonwhat found CleverReach through email records that authorize CleverReach. CleverReach is used by 3,635 companies runsonwhat tracks.

### Does Ontrex use Anthropic?

Yes. runsonwhat found Anthropic at Ontrex through a DNS verification record for Anthropic. Anthropic is a AI tool used by 73,234 companies runsonwhat tracks.

### Does Ontrex use AI tools?

Yes. runsonwhat has found Anthropic at Ontrex; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Ontrex may use more AI tools than these.

### Has Ontrex changed tools recently?

Yes. On runsonwhat's rechecks, Ontrex started using Anthropic, CleverReach and Atlassian (latest on November 5, 2026) and stopped using SwissSign, Anthropic and Atlassian (latest on October 29, 2026). A change counts only between two checks of ontrex.ch done the same way.

### How does runsonwhat know what Ontrex uses?

runsonwhat reads public records only. Of the 7 tools at Ontrex, 5 were found through DNS records, 2 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and ontrex.ch about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/ontrex.ch (updated November 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.