# What does Primary use?

Primary (primary.io) shows public evidence of 6 tools, according to runsonwhat (last checked 2026-10-16).

- Industry: Computer Networking
- Size: 51–200 employees
- Based in: Berlin, Germany
- Founded: 2018
- LinkedIn: https://www.linkedin.com/company/rent24-primary

## Edge & Hosting

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

## Go-to-market

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

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records |  |
| [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records |  |
| [Amazon SES](https://www.runsonwhat.com/reverse/ses) | Email Delivery | DNS verification records |  |

## FAQ

### What tools does Primary use?

As of October 2026, runsonwhat has found 6 tools at Primary (primary.io) in public records. Edge & Hosting: Cloudflare. Go-to-market: Mailchimp. Company Ops: Microsoft 365, Google Workspace and Amazon SES. Last checked October 16, 2026.

### What email provider does Primary use?

Primary uses Microsoft 365 for email and office software, alongside Google Workspace, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 701,710 companies runsonwhat tracks.

### What marketing software does Primary use?

Primary uses Mailchimp for marketing, according to runsonwhat (October 2026). runsonwhat found Mailchimp through email records that authorize Mailchimp. Mailchimp is used by 113,225 companies runsonwhat tracks.

### Does Primary use Cloudflare?

Yes. runsonwhat found Cloudflare at Primary through DNS records that point at Cloudflare and code on primary.io. Cloudflare is a CDN & Edge tool used by 692,707 companies runsonwhat tracks.

### How does runsonwhat know what Primary uses?

runsonwhat reads public records only. Of the 6 tools at Primary, 4 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 primary.io about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/primary.io (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.