A breakdown of the 751 companies running Microsoft Defender XDR.
Top industries
Information technology and services321
Financial services94
Professional and business services83
Industrial and manufacturing63
Education and training27
Construction and building26
Media and telecommunications19
Health and wellness18
No industry recorded: 12
Company size
1–1038 (5%)
11–5049 (7%)
51–250149 (21%)
251–50088 (12%)
501–1,00079 (11%)
1,001–5,000148 (21%)
5,001–10,00043 (6%)
10,001+121 (17%)
Share of companies with a recorded size, by employees.
No size recorded: 36
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Frequently asked questions
About the Microsoft Defender XDR data on this page.
How many companies use Microsoft Defender XDR?
Firmable holds confirmed Microsoft Defender XDR detections for 751 distinct companies, 278 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use Microsoft Defender XDR?
Kuvare Life Re, Quisitive and Eftsure are among the most prominent in the current set.
What industries use Microsoft Defender XDR?
Information technology and services, financial services and professional and business services lead the set, across 19 industries in total.
What size companies use Microsoft Defender XDR?
Adoption concentrates in the 51-250 employee band, across the companies whose size is recorded.
Where are Microsoft Defender XDR users based?
The United States, Australia, Canada and Singapore account for most detections, across 13 countries.
How current is this data?
278 companies were confirmed in the last 90 days. Last detection 19 September 2026.
