List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including Lynx Spa, Applied Research Solutions and Quarks. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$50M - $100M
728
$100M - $250M
727
$50M - $100M
726
$250M - $500M
725
$10M - $25M
725
$1M - $10M
725
$250M - $500M
724
$500M - $1B
724
$100M - $250M
724
$776M
$50M - $100M
724
$5.4M
$50M - $100M
724
$1B - $10B
723
$500M - $1B
723
$500M - $1B
722
$100M - $250M
721
$100M - $250M
721
$100M - $250M
720
$50M - $100M
719
$50M - $100M
719
$500M - $1B
718
$900M
$500M - $1B
718
$1M - $10M
717
$5.6M
$250M - $500M
716
$250M - $500M
716
$10M - $25M
715
$122M
$100M - $250M
715
$500M - $1B
713
$1M - $10M
712
$1M - $10M
712
$1B - $10B
712
$50M - $100M
712
<$1M
711
$500M - $1B
711
$100M - $250M
711
$100M - $250M
710
$1.9B
$500M - $1B
710
$500M - $1B
710
$89K
$25M - $50M
710
$250M - $500M
710
$100M - $250M
710
$500M - $1B
709
$1B - $10B
709
$50M - $100M
708
$1M - $10M
708
$10B+
707
$250M - $500M
706
$146M
$250M - $500M
706
$50M - $100M
706
$10M - $25M
706
$1B - $10B
705
$250M - $500M
705
$800M
$1B - $10B
704
$100M - $250M
704
$25M - $50M
704
$100M - $250M
703
$10M - $25M
703
$335M
$250M - $500M
702
$50M - $100M
701
$10M - $25M
701
$250M - $500M
700
$500M - $1B
700
$25M - $50M
700
$250M - $500M
699
$27M
$100M - $250M
699
$250M - $500M
699
$50M - $100M
699
$237M
$1B - $10B
698
$150M
$50M - $100M
698
$500M - $1B
697
$100M - $250M
697
$10M - $25M
696
$25M - $50M
696
$250M
$500M - $1B
696
$500M - $1B
695
$250M - $500M
694
$250M - $500M
694
$50M - $100M
693
$50M - $100M
693
$13M
$1B - $10B
693
$250M - $500M
693
$25M - $50M
692
$250M - $500M
692
$1M - $10M
691
$250M - $500M
691
$10M - $25M
691
$18M
$100M - $250M
691
$25M - $50M
691
$500M - $1B
691
$100M - $250M
691
$1B - $10B
690
$500M - $1B
690
$50M - $100M
690
$1M - $10M
690
$100M - $250M
690
$100M - $250M
689
$1B - $10B
689
$50M - $100M
688
$1B+
687
$1M - $10M
687
$10M - $25M
686
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 Lynx Spa, Applied Research Solutions and Quarks.
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
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