# What does Callstream use?

Callstream (callstream.com) shows public evidence of 8 tools, according to runsonwhat (last checked 2026-10-23).

- Industry: Telecommunications
- Size: 11–50 employees
- Based in: Birmingham, United Kingdom
- Founded: 1999
- LinkedIn: https://www.linkedin.com/company/callstream-ltd

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Amazon Route 53](https://www.runsonwhat.com/reverse/route53) | DNS | DNS records |  |
| [Microsoft Azure](https://www.runsonwhat.com/reverse/azure) | Hosting & Cloud | Custom domain |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Zendesk](https://www.runsonwhat.com/reverse/zendesk) | Support & Docs | DNS verification records, Email records |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records |  |
| [Atlassian](https://www.runsonwhat.com/reverse/atlassian) | Dev Tools | DNS verification records |  |
| [KnowBe4](https://www.runsonwhat.com/reverse/knowbe4) | Security & Compliance | DNS verification records |  |
| [Workplace from Meta](https://www.runsonwhat.com/reverse/meta-workplace) | Collaboration | DNS verification records |  |

## FAQ

### What tools does Callstream use?

As of October 2026, runsonwhat has found 8 tools at Callstream (callstream.com) in public records. Edge & Hosting: Amazon Route 53 and Microsoft Azure. Go-to-market: Zendesk. Company Ops: Google Workspace, Atlassian and KnowBe4. Last checked October 23, 2026.

### What cloud does Callstream run on?

Callstream uses Microsoft Azure for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Microsoft Azure through a subdomain that points at Microsoft Azure. Microsoft Azure is used by 47,276 companies runsonwhat tracks.

### What email provider does Callstream use?

Callstream uses Google Workspace for email and office software, according to runsonwhat (October 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace. Google Workspace is used by 404,454 companies runsonwhat tracks.

### What does Callstream use for customer support?

Callstream uses Zendesk for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found Zendesk through a DNS verification record for Zendesk and email records. Zendesk is used by 42,128 companies runsonwhat tracks.

### Does Callstream use Amazon Route 53?

Yes. runsonwhat found Amazon Route 53 at Callstream through DNS records that point at Amazon Route 53. Amazon Route 53 is a DNS tool used by 85,191 companies runsonwhat tracks.

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

The companies with the stacks most like Callstream's are Connectivity Wireless, Fanrock, TotalEnergies Germany and OpenSail Digital Agency, according to runsonwhat (October 2026). Each shares 2 to 4 tools with Callstream, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Callstream uses?

runsonwhat reads public records only. Of the 8 tools at Callstream, 6 were found through DNS records, 1 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 callstream.com about monthly.


---

Source: runsonwhat, https://www.runsonwhat.com/company/callstream.com (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.