List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including Stark Aerospace, Tesorion and TheBestIRS, Insurance Recruiting Specialists (Inactive). Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$10M - $25M
107
$10M - $25M
107
$1B - $10B
107
$1M - $10M
107
$25M - $50M
107
$1M - $10M
107
$25M - $50M
107
$95M
$100M - $250M
107
$127M
$25M - $50M
106
$1M - $10M
106
$406M
$250M - $500M
106
$10M - $25M
106
$93M
$25M - $50M
106
$100M - $250M
106
$25M - $50M
106
$25M - $50M
106
$1M - $10M
106
$10M - $25M
106
$10M - $25M
106
$100M - $250M
106
$25M - $50M
106
$100M - $250M
106
<$1M
106
$10M - $25M
106
$1M - $10M
106
$25M - $50M
105
$1B - $10B
105
$1M - $10M
105
$250M - $500M
105
$26M
$10M - $25M
105
$25M - $50M
105
$10M - $25M
105
$500M - $1B
105
$50M - $100M
105
$50M - $100M
105
$825M
$50M - $100M
105
$10M - $25M
105
$50M - $100M
105
$50M - $100M
105
$25M - $50M
105
$100M - $250M
104
$50M - $100M
104
$100M - $250M
104
$40M
$10M - $25M
104
$1M - $10M
104
$50M - $100M
104
$100M - $250M
104
$100M - $250M
104
$52M
$100M - $250M
104
$401M
$25M - $50M
104
$1M - $10M
104
$10M - $25M
104
$24M
$1M - $10M
104
$100M - $250M
103
$6.6M
$10M - $25M
103
$50M - $100M
103
$116M
$10M - $25M
103
$1M - $10M
103
$10M - $25M
103
$10M - $25M
103
$50M
$100M - $250M
103
$100M - $250M
103
$100M - $250M
103
$10M - $25M
103
$128M
$50M - $100M
103
$50M - $100M
103
$100M - $250M
103
$1M - $10M
102
$25M - $50M
102
$30M
$10M - $25M
102
$10M - $25M
102
$10M - $25M
102
$6.5M
$50M - $100M
102
$200M
$100M - $250M
102
$1M - $10M
102
$10M - $25M
102
$50M - $100M
102
$10M - $25M
101
$50M - $100M
101
$1M - $10M
101
$10M - $25M
101
$10M - $25M
101
$50M - $100M
101
$100M - $250M
101
$100M - $250M
101
$1M - $10M
101
$10M - $25M
101
$100M - $250M
101
$50M - $100M
101
$10M - $25M
101
$10M - $25M
100
$1M - $10M
100
$1M - $10M
100
$25M - $50M
100
$50M - $100M
100
$50M - $100M
100
$50M - $100M
100
$50M - $100M
100
$500M - $1B
100
$50M - $100M
100
About companies using Microsoft Defender
Why target companies using Microsoft Defender?
Microsoft Defender is a Security, identity & compliance technology. Companies running these tools already spend on identity, endpoint, email and consent security, which makes them mature buyers in the category. Companies on the list include Stark Aerospace, Tesorion and TheBestIRS, Insurance Recruiting Specialists (Inactive).
Which industries use Microsoft Defender the most?
Among companies using Microsoft Defender on LeadIQ, the most common industries are IT Services and IT Consulting, Software Development, Financial Services, Insurance, Higher Education and Hospitals and Health Care. Narrow your list to the industry you sell into from there.
Where are companies using Microsoft Defender located?
Companies using Microsoft Defender are most often headquartered in the United States, the United Kingdom, Canada, Germany, Australia and France.
What other Security, identity & compliance technologies do companies use?
Prospecting the wider Security, identity & compliance space? Related technologies with their own company lists include Microsoft Active Directory, Cisco, Microsoft Entra ID and CookieYes.
How do I reach decision makers at companies using Microsoft Defender?
Open a company to see its employee directory and email format, then use LeadIQ to get verified work emails and phone numbers for the people you want to reach and push them straight to your CRM or sequencer.
Insights based on LeadIQ data refreshed in September 2026.
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