# What does Microsoft use?

Microsoft (appnexus.com) shows public evidence of 16 tools, according to runsonwhat (last checked 2026-10-09).

- Industry: Advertising
- Size: 1,001–5,000 employees
- Based in: Redmond, United States
- Founded: 2007
- LinkedIn: https://www.linkedin.com/company/microsoft-advertising

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Fastly](https://www.runsonwhat.com/reverse/fastly) | CDN & Edge | Website code |  |
| [Microsoft Azure](https://www.runsonwhat.com/reverse/azure) | Hosting & Cloud | Website code |  |
| [Pantheon](https://www.runsonwhat.com/reverse/pantheon) | Hosting & Cloud | Custom domain |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft Clarity](https://www.runsonwhat.com/reverse/clarity) | Analytics | Website code |  |
| [Atlassian Statuspage](https://www.runsonwhat.com/reverse/statuspage) | Monitoring | DNS verification records |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft Ads](https://www.runsonwhat.com/reverse/bing-ads) | Ads & Pixels | Website code |  |
| [LinkedIn Insight Tag](https://www.runsonwhat.com/reverse/linkedin-insight) | Ads & Pixels | Website code |  |
| [TikTok Pixel](https://www.runsonwhat.com/reverse/tiktok-pixel) | Ads & Pixels | Website code |  |
| [Marketo](https://www.runsonwhat.com/reverse/marketo) | Marketing | Custom domain, Email records |  |
| [LivePerson](https://www.runsonwhat.com/reverse/liveperson) | Support & Docs | Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | Email records, DNS verification records |  |
| [Atlassian](https://www.runsonwhat.com/reverse/atlassian) | Dev Tools | DNS verification records |  |
| [Mailchimp Transactional](https://www.runsonwhat.com/reverse/mandrill) | Email Delivery | Email records |  |
| [Webex](https://www.runsonwhat.com/reverse/webex) | Collaboration | DNS verification records |  |

## FAQ

### What tools does Microsoft use?

As of October 2026, runsonwhat has found 16 tools at Microsoft (appnexus.com) in public records. Edge & Hosting: Fastly, Microsoft Azure and Pantheon. Data & Observability: Microsoft Clarity and Atlassian Statuspage. Go-to-market: Microsoft Ads, LinkedIn Insight Tag and TikTok Pixel. Company Ops: Microsoft 365, Atlassian and Mailchimp Transactional. Last checked October 9, 2026.

### What cloud does Microsoft run on?

Microsoft uses Microsoft Azure for hosting and cloud infrastructure, alongside Pantheon, according to runsonwhat (October 2026). runsonwhat found Microsoft Azure through Microsoft Azure code on appnexus.com. Microsoft Azure is used by 45,722 companies runsonwhat tracks.

### What email provider does Microsoft use?

Microsoft uses Microsoft 365 for email and office software, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365 and a DNS verification record. Microsoft 365 is used by 704,090 companies runsonwhat tracks.

### What does Microsoft use for customer support?

Microsoft uses LivePerson for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found LivePerson through LivePerson code on appnexus.com. LivePerson is used by 629 companies runsonwhat tracks.

### What analytics tools does Microsoft use?

Microsoft uses Microsoft Clarity for analytics, according to runsonwhat (October 2026). runsonwhat found Microsoft Clarity through Microsoft Clarity code on appnexus.com. Microsoft Clarity is used by 127,243 companies runsonwhat tracks.

### What marketing software does Microsoft use?

Microsoft uses Marketo for marketing, according to runsonwhat (October 2026). runsonwhat found Marketo through a subdomain that points at Marketo and email records. Marketo is used by 8,754 companies runsonwhat tracks.

### Does Microsoft use Microsoft Ads?

Yes. runsonwhat found Microsoft Ads at Microsoft through Microsoft Ads code on appnexus.com. Microsoft Ads is a Ads & Pixels tool used by 115,705 companies runsonwhat tracks.

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

The companies with the stacks most like Microsoft's are Champion Opco, alkosto, American Health Network and Lombard, according to runsonwhat (October 2026). Each shares 5 to 6 tools with Microsoft, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Microsoft uses?

runsonwhat reads public records only. Of the 16 tools at Microsoft, 7 were found through code on appnexus.com, 4 through DNS records, 2 through email records, 2 through subdomains that point at the vendor and 1 through website configuration files. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and appnexus.com about monthly.


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