List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including Halian | Managed Services, Recruitment Agency & Contract Staffing, Inetum-Realdolmen and The House of Shipping. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$50M - $100M
837
$25M - $50M
837
$50M - $100M
837
$42M
$25M - $50M
836
$50M - $100M
836
$1.7B
$100M - $250M
836
$1.1B
$500M - $1B
836
$25M - $50M
835
$100M - $250M
835
$100M
$100M - $250M
834
$100M - $250M
834
$5.4M
$100M - $250M
834
$100M - $250M
834
$500M - $1B
834
$1M - $10M
833
$11B
$500M - $1B
830
$500M - $1B
829
$500M - $1B
829
$1B - $10B
828
$72M
$100M - $250M
828
$50M - $100M
828
$10M
$500M - $1B
827
$100M - $250M
827
$100M - $250M
826
$100M - $250M
826
$100M - $250M
825
$50M - $100M
824
$1.5B
$1B - $10B
824
$1B - $10B
823
$500M - $1B
822
$100M - $250M
822
$100M - $250M
821
$100M - $250M
820
$25M - $50M
819
$25M - $50M
819
$100M - $250M
818
$500M - $1B
817
$100M - $250M
817
$25M - $50M
817
$1B - $10B
817
$50M - $100M
816
$50M - $100M
815
$500M - $1B
815
$250M - $500M
815
$50M - $100M
814
$500M - $1B
814
$100M - $250M
813
$100M - $250M
811
$50M - $100M
811
$10M - $25M
810
$50M - $100M
810
$50M - $100M
809
$250M - $500M
809
$61M
$250M - $500M
809
$10B+
808
$250M - $500M
807
$100M - $250M
807
$500M - $1B
804
$100M - $250M
803
$1M - $10M
803
$250M - $500M
802
$25M - $50M
802
$100M - $250M
801
$100M - $250M
801
$310M
$250M - $500M
798
$25M - $50M
797
$25M - $50M
796
$100M - $250M
796
$45M
$1B - $10B
795
$50M - $100M
793
$1B - $10B
792
$50M - $100M
792
$1B - $10B
792
$10M - $25M
792
$500M - $1B
792
$100M - $250M
792
$10M - $25M
791
$500M - $1B
790
$50M - $100M
790
$1M - $10M
789
$1B - $10B
789
$2.2B
$50M - $100M
789
$1B - $10B
789
$10M - $25M
788
$100M - $250M
788
$1B - $10B
787
$500M - $1B
787
$1B - $10B
787
$50M - $100M
787
$100M - $250M
787
$100M - $250M
786
$25M - $50M
786
$3.5B
$500M - $1B
784
$100M - $250M
783
$25M - $50M
783
$10M - $25M
782
$500M - $1B
781
$25M - $50M
781
$100M - $250M
781
$100M - $250M
781
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 Halian | Managed Services, Recruitment Agency & Contract Staffing, Inetum-Realdolmen and The House of Shipping.
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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