List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including The Openwork Partnership, dmg events and AloricaDR. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$100M - $250M
885
$50M - $100M
885
$10M - $25M
884
$250M - $500M
884
$2.2B
$50M - $100M
883
$500M - $1B
883
$100M - $250M
883
$250M - $500M
880
$1B - $10B
880
$100M - $250M
880
$100M - $250M
879
$250M - $500M
879
$50M - $100M
879
$90M
$100M - $250M
878
$118M
$500M - $1B
877
$3.1B
$500M - $1B
877
$881M
$100M - $250M
877
$25M - $50M
874
$75M
$1B - $10B
874
$500M - $1B
871
$1.2M
$25M - $50M
870
$100M - $250M
870
$10M - $25M
869
$25M - $50M
869
$10M - $25M
869
$10M - $25M
868
$100M - $250M
868
$1B - $10B
868
$250M - $500M
867
$93M
$500M - $1B
866
$1.8M
$50M - $100M
866
$274M
$500M - $1B
865
$500M - $1B
863
$250M - $500M
863
$1M - $10M
862
$250M - $500M
862
$500M - $1B
861
$399M
$100M - $250M
861
$50M - $100M
860
$50M - $100M
860
$250M - $500M
860
$10M - $25M
860
$50M - $100M
860
$10M
$100M - $250M
860
$940M
$1B - $10B
859
$100M - $250M
858
$100M - $250M
858
$100M - $250M
857
$500M - $1B
857
$500M - $1B
857
$1B - $10B
856
$500M - $1B
856
$50M - $100M
854
$10M - $25M
854
$50M - $100M
854
$500M - $1B
854
$42M
$25M - $50M
853
$103M
$500M - $1B
852
$325M
$1B - $10B
852
$1B - $10B
851
$50M - $100M
851
$250M - $500M
851
$100M - $250M
851
$1B - $10B
850
$50M - $100M
850
$500M - $1B
850
$975M
$500M - $1B
850
$50M - $100M
849
$25M - $50M
849
$100M - $250M
848
$500M - $1B
848
$100M - $250M
848
$100M - $250M
848
$104M
$500M - $1B
848
$500M - $1B
847
$100M - $250M
847
$11B
$500M - $1B
846
$1B - $10B
846
$100M - $250M
846
$290M
$10B+
846
$100M - $250M
845
$1M - $10M
845
$1B - $10B
844
$50M - $100M
844
$1B - $10B
842
$1.7B
$100M - $250M
842
$100M - $250M
842
$10M - $25M
841
$10M
$500M - $1B
840
$500M - $1B
839
$500M
$100M - $250M
839
$50M - $100M
838
$100M
$250M - $500M
837
$500M - $1B
837
$25M - $50M
836
$50M - $100M
836
$50M - $100M
836
$50M - $100M
835
$25M - $50M
834
$1M - $10M
834
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 The Openwork Partnership, dmg events and AloricaDR.
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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Top companies by employee count
Top companies in United States by employee countTop companies in United Kingdom by employee countTop companies in Canada by employee countTop companies in Germany by employee countTop companies in France by employee countTop companies in Australia by employee countTop companies in Netherlands by employee countTop companies in India by employee countTop companies in Spain by employee countTop companies in Switzerland by employee countTop companies in Sweden by employee countTop companies in Italy by employee countTop companies in Denmark by employee countTop companies in Brazil by employee countTop companies in Ireland by employee count
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