List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including Western International Securities, Wilsons Advisory and AHT Insurance. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$100M - $250M
137
$1B - $10B
137
$11M
$1B - $10B
136
$100M - $250M
136
$10M - $25M
136
$25M - $50M
136
$100M - $250M
136
$300M
$50M - $100M
136
$25M - $50M
136
$1M - $10M
136
$500M - $1B
136
$100M - $250M
135
$10M - $25M
135
$1B - $10B
135
$100M - $250M
135
$50M - $100M
135
$50M - $100M
135
$10M - $25M
135
$25M - $50M
135
$50M - $100M
135
$82M
$1M - $10M
135
<$1M
135
$50M - $100M
135
<$1M
135
$50M - $100M
135
$330M
$25M - $50M
135
$250M - $500M
135
$1M - $10M
135
$25M - $50M
134
$23M
$250M - $500M
134
$322M
$100M - $250M
134
$100M - $250M
134
$1B - $10B
134
$55M
$10M - $25M
134
$1M
$25M - $50M
134
$10M - $25M
134
$25M - $50M
134
$100M - $250M
134
$25M - $50M
134
$50M - $100M
134
$50M - $100M
133
$25M - $50M
133
$50M - $100M
133
$100M - $250M
133
$100M - $250M
133
$1B - $10B
133
$50M - $100M
133
$1B - $10B
133
$25M - $50M
133
$100M - $250M
133
$1M - $10M
133
$25M - $50M
133
$100M - $250M
133
$10M - $25M
133
$10M - $25M
133
$25M - $50M
133
$10M - $25M
132
$10M - $25M
132
$340M
$50M - $100M
132
$50M - $100M
132
$100M - $250M
132
$186M
$1M - $10M
132
$1B - $10B
132
$50M - $100M
132
$100M - $250M
132
$100M - $250M
132
$10M - $25M
132
$25M - $50M
132
$10M
$100M - $250M
132
<$1M
131
$100M - $250M
131
$233M
$1M - $10M
131
$100M - $250M
131
$100M - $250M
131
$50M - $100M
131
$100M - $250M
131
$1B - $10B
131
$25M - $50M
131
$1M - $10M
131
$50M - $100M
131
$50M - $100M
131
$25M - $50M
131
$100M - $250M
131
$10M - $25M
130
$1M - $10M
130
$100M - $250M
130
$25M - $50M
130
$10M - $25M
130
$25M - $50M
130
$1M - $10M
130
$20M
$100M - $250M
130
$250M - $500M
130
$10M - $25M
129
$10M - $25M
129
$100M - $250M
129
$250M - $500M
129
$69M
$50M - $100M
129
$10M - $25M
129
$100M
$1B - $10B
129
$25M
$10M - $25M
129
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 Western International Securities, Wilsons Advisory and AHT Insurance.
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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