List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including Len The Plumber Heating & Air, Prestone Official and Red River Mutual. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$250M - $500M
195
$100M - $250M
195
$100M - $250M
195
$1.6M
$10M - $25M
195
$121M
$25M - $50M
195
$100M - $250M
195
$25M - $50M
195
$10M - $25M
195
$25M - $50M
194
$100M - $250M
194
$250M - $500M
194
$10M - $25M
194
$100M - $250M
194
$25M - $50M
194
$25M - $50M
194
$331K
$100M - $250M
194
$1M - $10M
194
$25M - $50M
194
$100M - $250M
193
$100M - $250M
193
$50M - $100M
193
$50M - $100M
193
$100M - $250M
193
$10M - $25M
193
$100M - $250M
193
$100M - $250M
193
$100M - $250M
193
$76M
$100M - $250M
192
$1M - $10M
192
$10M - $25M
192
$500M - $1B
192
$500M - $1B
192
$1B - $10B
192
$1M - $10M
192
$100M - $250M
192
$10M - $25M
192
$10M - $25M
192
$1M - $10M
192
$100M - $250M
191
$100M - $250M
191
$100M - $250M
191
$100M - $250M
191
$1B - $10B
191
$100M - $250M
191
$12M
$100M - $250M
191
$50M - $100M
191
$10M - $25M
190
$50M - $100M
190
$50M - $100M
190
$10M - $25M
190
$1M - $10M
190
$20M
$500M - $1B
190
$1M - $10M
189
$1M - $10M
189
$25M
<$1M
189
$25M - $50M
189
$100M - $250M
189
$200M
$50M - $100M
189
$25M - $50M
189
$100M - $250M
189
$10M - $25M
189
$100M - $250M
189
$1M - $10M
189
$1B - $10B
188
$10M - $25M
188
$100M - $250M
188
$25M - $50M
188
$50M - $100M
188
$105M
$100M - $250M
188
$100M - $250M
188
$1M - $10M
187
$500M - $1B
187
<$1M
187
$46M
$50M - $100M
187
$100M - $250M
187
$500M - $1B
187
$1M - $10M
187
$100M - $250M
187
$50M - $100M
187
$85M
$100M - $250M
187
$25M - $50M
187
$1M - $10M
187
$100M - $250M
186
$100M - $250M
186
$10M - $25M
186
$100M - $250M
186
$13M
$100M - $250M
186
$1M - $10M
186
$1M - $10M
186
$250M - $500M
186
$100M - $250M
185
$36M
$100M - $250M
185
$25M - $50M
185
$25M - $50M
185
$100M - $250M
185
$10M - $25M
185
$100M - $250M
185
$10M - $25M
185
$10M - $25M
185
$10M - $25M
185
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 Len The Plumber Heating & Air, Prestone Official and Red River Mutual.
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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