List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including Swiss Re, Mizuho and Infinite Computer Solutions. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$700M
$10B+
15K
$10B+
15K
$1B - $10B
15K
$1.1B
$1B - $10B
15K
$5.5M
$1B - $10B
15K
$265M
$10B+
15K
$10B+
15K
$2.2B
$10B+
15K
$10B+
15K
$5.4B
$500M - $1B
15K
$1B - $10B
15K
$500M - $1B
15K
$1B - $10B
15K
$10B+
15K
$1B - $10B
15K
$10B+
15K
$10B+
15K
$500M
$10B+
15K
$5.8B
$10B+
15K
$25M - $50M
15K
$2.5B
$10B+
15K
$250M - $500M
15K
$1B - $10B
15K
$3.3B
$10B+
15K
$886M
$10B+
14K
$1.1B
$1B - $10B
14K
$1B - $10B
14K
$10B+
14K
$1B - $10B
14K
$1B - $10B
14K
$1B - $10B
14K
$1B - $10B
14K
$142M
$100M - $250M
14K
$126M
$1B - $10B
14K
$1.6B
$1B - $10B
14K
$1B - $10B
14K
$10B+
14K
$5.2B
$1B - $10B
14K
$250M - $500M
14K
$1B - $10B
14K
$1B - $10B
14K
$1B - $10B
14K
$1B - $10B
14K
$1B - $10B
14K
$10B+
14K
$1B - $10B
14K
$10B+
14K
$10B+
13K
$1B - $10B
13K
$136M
$1B - $10B
13K
$3.5B
$1B - $10B
13K
$1B - $10B
13K
$10B+
13K
$500M - $1B
13K
$10B+
13K
$1.6B
$100M - $250M
13K
$277M
$100M - $250M
13K
$1B - $10B
13K
$5.7M
$1B - $10B
13K
$1B - $10B
13K
$500M - $1B
13K
$10B+
13K
$1B - $10B
13K
$1.3B
$10B+
13K
$1.4B
$250M - $500M
13K
$7.2B
$1B - $10B
13K
$10B+
13K
$1B - $10B
13K
$1B - $10B
13K
$35M
$10B+
13K
$10B+
13K
$250M - $500M
13K
$10B+
13K
$550M
$10B+
13K
$1B - $10B
13K
$1.1B
$1B - $10B
13K
$200M
$1B - $10B
13K
$10B+
13K
$1.3B
$1B - $10B
13K
$1B - $10B
13K
$10M - $25M
12K
$3B
$1B - $10B
12K
$5.3B
$1B - $10B
12K
$1.2B
$10B+
12K
$1.2B
$1B - $10B
12K
$4.4B
$1B - $10B
12K
$10B+
12K
$500M - $1B
12K
$1.8B
$500M - $1B
12K
$1.5B
$1B - $10B
12K
$10B+
12K
$26B
$1B - $10B
12K
$426M
$100M - $250M
12K
$6.2B
$10B+
12K
$100M - $250M
12K
$1B - $10B
12K
$250M - $500M
12K
$10B+
12K
$442K
$1B - $10B
12K
$1B - $10B
12K
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 Swiss Re, Mizuho and Infinite Computer Solutions.
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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