Outlook's tech stack
What does Outlook use?
Outlook (outlook.com) uses at least 6 tools we can see from public records, including Microsoft Azure for hosting, Microsoft 365 for email and documents and GlobalSign for security. Last checked .
- Based in
- Redmond, United States
- Legal name
- Microsoft Corporation
- Tools found
- 6
- Categories
- 5
- Layers
- 3 of 5
- Last checked
- Oct 2026
Outlook's stack, layer by layer
Each tool links to the other companies we've found using it. The label says what kind of public trace gave it away.
Edge & Hosting
1 tool, where the bytes are served from
Hosting & Cloud
Go-to-market
2 tools, how they find and keep customers
Marketing
Ads & Pixels
Company Ops
3 tools, what the team runs on day to day
Workspace
Security & Compliance
Outlook tech stack FAQ
What tools does Outlook use?
As of October 2026, runsonwhat has found 6 tools at Outlook (outlook.com) in public records. Edge & Hosting: Microsoft Azure. Go-to-market: Google Ads. Company Ops: Microsoft 365, GlobalSign and DigiCert. Last checked October 9, 2026.
What cloud does Outlook run on?
Outlook 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 and DNS records. Microsoft Azure is used by 45,696 companies runsonwhat tracks.
What email provider does Outlook use?
Outlook 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 704,057 companies runsonwhat tracks.
Does Outlook use Google Ads?
Yes. runsonwhat found Google Ads at Outlook through Google Ads code on outlook.com. Google Ads is a Ads & Pixels tool used by 462,965 companies runsonwhat tracks.
How does runsonwhat know what Outlook uses?
runsonwhat reads public records only. Of the 6 tools at Outlook, 3 were found through DNS records, 1 through email records, 1 through code on outlook.com 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 outlook.com about monthly.
We read public traces only: DNS and email records, certificate logs, website code and published subprocessor lists. A tool is listed when a direct record backs it up, and dropped when a recheck no longer finds it. Is this your company? See how to opt out.