# What does City Computing Limited use?

City Computing Limited (citycomputing.com) shows public evidence of 7 tools, according to runsonwhat (last checked 2026-10-23).

- Industry: IT Services
- Size: 11–50 employees
- Based in: Hong Kong SAR China
- Founded: 1993
- LinkedIn: https://www.linkedin.com/company/city-computing-ltd

## Edge & Hosting

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

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | Email records |  |
| [Let's Encrypt](https://www.runsonwhat.com/reverse/letsencrypt) | Security & Compliance | DNS records |  |
| [GlobalSign](https://www.runsonwhat.com/reverse/globalsign) | Security & Compliance | DNS records |  |
| [Sectigo](https://www.runsonwhat.com/reverse/sectigo) | Security & Compliance | DNS records |  |
| [DigiCert](https://www.runsonwhat.com/reverse/digicert) | Security & Compliance | DNS records |  |
| [Google Trust Services](https://www.runsonwhat.com/reverse/google-trust) | Security & Compliance | DNS records |  |

## FAQ

### What tools does City Computing use?

As of October 2026, runsonwhat has found 7 tools at City Computing (citycomputing.com) in public records. Edge & Hosting: Cloudflare. Company Ops: Microsoft 365, Let's Encrypt and GlobalSign. Last checked October 23, 2026.

### What email provider does City Computing use?

City Computing uses Microsoft 365 for email and office software, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365. Microsoft 365 is used by 715,913 companies runsonwhat tracks.

### Does City Computing use Cloudflare?

Yes. runsonwhat found Cloudflare at City Computing through DNS records that point at Cloudflare. Cloudflare is a CDN & Edge tool used by 713,362 companies runsonwhat tracks.

### How does runsonwhat know what City Computing uses?

runsonwhat reads public records only. Of the 7 tools at City Computing, 6 were found through DNS records, 1 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and citycomputing.com about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/citycomputing.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.