# What does CalPlus use?

CalPlus (calplus.de) shows public evidence of 11 tools, according to runsonwhat (last checked 2026-11-10).

- Industry: Wholesale
- Size: 11–50 employees
- Based in: Berlin, Germany
- Founded: 1999
- LinkedIn: https://www.linkedin.com/company/calplus-gmbh

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | Website code |  |
| [GoDaddy](https://www.runsonwhat.com/reverse/godaddy) | DNS | DNS records, Website code |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [PayPal](https://www.runsonwhat.com/reverse/paypal) | Payments & Billing | Website code |  |
| [Three.js](https://www.runsonwhat.com/reverse/threejs) | Media & UI | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [LinkedIn Insight Tag](https://www.runsonwhat.com/reverse/linkedin-insight) | Ads & Pixels | Website code |  |
| [Brevo](https://www.runsonwhat.com/reverse/brevo) | Marketing | DNS verification records, Email records, Website code |  |
| [Inxmail](https://www.runsonwhat.com/reverse/inxmail) | Marketing | Email records |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | Email records |  |
| [Exclaimer](https://www.runsonwhat.com/reverse/exclaimer) | Workspace | Email records |  |
| [CCM19](https://www.runsonwhat.com/reverse/ccm19) | Security & Compliance | Website code |  |

## FAQ

### What tools does CalPlus use?

As of November 2026, runsonwhat has found 11 tools at CalPlus (calplus.de) in public records. Edge & Hosting: Cloudflare and GoDaddy. Application: PayPal and Three.js. Go-to-market: LinkedIn Insight Tag, Brevo and Inxmail. Company Ops: Microsoft 365, Exclaimer and CCM19. Last checked November 10, 2026.

### What email provider does CalPlus use?

CalPlus uses Microsoft 365 for email and office software, alongside Exclaimer, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365. Microsoft 365 is used by 739,072 companies runsonwhat tracks.

### What payment provider does CalPlus use?

CalPlus uses PayPal for payments and billing, according to runsonwhat (November 2026). runsonwhat found PayPal through PayPal code on calplus.de. PayPal is used by 35,173 companies runsonwhat tracks.

### What marketing software does CalPlus use?

CalPlus uses Brevo for marketing, alongside Inxmail, according to runsonwhat (November 2026). runsonwhat found Brevo through a DNS verification record for Brevo and email records. Brevo is used by 84,906 companies runsonwhat tracks.

### Does CalPlus use Cloudflare?

Yes. runsonwhat found Cloudflare at CalPlus through Cloudflare code on calplus.de. Cloudflare is a CDN & Edge tool used by 737,326 companies runsonwhat tracks.

### Which companies have a tech stack similar to CalPlus's?

The companies with the stacks most like CalPlus' are Lfk Landesverband Freie Ambulante Krankenpflege Nrw E.v., Handwerkskammer Niederbayern - Oberpfalz, Wellnest International and Sysmex Netherlands & Belgium, according to runsonwhat (November 2026). Each shares 3 to 5 tools with CalPlus, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what CalPlus uses?

runsonwhat reads public records only. Of the 11 tools at CalPlus, 6 were found through code on calplus.de, 3 through email records and 2 through DNS records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and calplus.de about monthly.


---

Source: runsonwhat, https://www.runsonwhat.com/company/calplus.de (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.