List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including BC Transit, University of Illinois College of Medicine and DNI (Delaware Nation Industries). Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$100M - $250M
780
$1.1M
$25M - $50M
780
$500M - $1B
779
$250M - $500M
779
$500M - $1B
779
$1B - $10B
779
$100M - $250M
778
$250M - $500M
778
$100M - $250M
778
$250M - $500M
778
$10M - $25M
777
$500M - $1B
777
$100M - $250M
777
$1B - $10B
776
$500M - $1B
776
$1B - $10B
776
$25M - $50M
775
$250M - $500M
775
$250M - $500M
775
$100M - $250M
775
$250M - $500M
774
$500M
$100M - $250M
774
$1B - $10B
774
$500M - $1B
774
$262M
$1B - $10B
771
$25M - $50M
771
$500M - $1B
769
$500M - $1B
769
$250M - $500M
769
$50M - $100M
769
$1B - $10B
767
$500M - $1B
766
$50M - $100M
766
$1B - $10B
766
$250M - $500M
765
$25M - $50M
764
$1M - $10M
763
$372M
$500M - $1B
763
$59M
$250M - $500M
763
$50M - $100M
763
$1M - $10M
762
$250M - $500M
761
$250M - $500M
760
$100M - $250M
760
$250M - $500M
759
$100M - $250M
759
$500M - $1B
758
$1B - $10B
758
$50M - $100M
757
$50M - $100M
757
$256M
$1B - $10B
753
$50M - $100M
753
$1B - $10B
753
$25M - $50M
753
$210M
$250M - $500M
752
$112M
$1B - $10B
751
$33M
$250M - $500M
750
$50M - $100M
749
$500M - $1B
749
$25M - $50M
749
$10M - $25M
748
$1B - $10B
748
$500M - $1B
747
$126M
$250M - $500M
747
$500M - $1B
747
$500M - $1B
746
$250M - $500M
746
$250M - $500M
746
$250M - $500M
746
$50M - $100M
746
$250M - $500M
745
$500M - $1B
745
$250M - $500M
745
$250M - $500M
745
$1.7M
$1B - $10B
745
$50M - $100M
744
$10M - $25M
744
$530M
$25M - $50M
743
$30M
$25M - $50M
743
$50M - $100M
743
$10M - $25M
742
$500M - $1B
741
$250M - $500M
741
$10M - $25M
741
$100M - $250M
738
$500M - $1B
735
$1B - $10B
735
$100M - $250M
734
$100M - $250M
733
$500M - $1B
731
$10M - $25M
730
$500M - $1B
729
$500M - $1B
729
$50M - $100M
729
$1B - $10B
729
$250M - $500M
728
$725K
$500M - $1B
727
$25M - $50M
726
$50M - $100M
726
$250M - $500M
725
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 BC Transit, University of Illinois College of Medicine and DNI (Delaware Nation Industries).
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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