List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including Manning College of Information and Computer Sciences, UMass Amherst, CADENAS GmbH and RigNet. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$10M - $25M
262
$25M - $50M
261
$12M
$100M - $250M
261
$100M - $250M
261
$50M - $100M
261
$100M - $250M
261
$48M
$50M - $100M
261
$100M - $250M
260
$1M - $10M
260
$10M - $25M
260
$100M - $250M
260
$50M - $100M
260
$1M - $10M
260
$10M - $25M
260
$250M - $500M
260
$100M - $250M
260
$50M - $100M
260
$100M - $250M
260
$100M - $250M
259
$1M - $10M
259
$50M - $100M
259
$10M - $25M
259
$25M - $50M
258
$50M - $100M
258
$100M - $250M
258
$25M - $50M
258
$25M - $50M
258
$25M - $50M
258
$50M - $100M
257
$25M - $50M
257
$500M - $1B
257
$100M - $250M
257
$10M - $25M
257
$10M - $25M
257
$10M - $25M
257
$100M - $250M
257
$250M - $500M
256
$1M - $10M
255
$100M - $250M
255
$1B - $10B
255
$250M - $500M
255
$100M - $250M
255
$187M
$100M - $250M
255
$10M - $25M
254
$10M - $25M
254
$100M - $250M
254
$250M - $500M
254
$100M - $250M
254
$50M - $100M
254
$50M - $100M
253
$50M - $100M
253
$50M - $100M
253
$100M - $250M
253
$3.8M
$250M - $500M
253
$805M
$100M - $250M
253
$500M - $1B
253
$250M - $500M
253
$10M - $25M
253
$50M - $100M
252
$1M - $10M
252
$100M - $250M
252
$25M - $50M
252
$25M - $50M
252
$250M - $500M
252
$250M - $500M
252
$10M - $25M
252
$1M - $10M
251
$25M - $50M
251
$50M - $100M
251
$25M - $50M
251
$1B - $10B
251
$44M
$100M - $250M
251
$1M - $10M
251
$176M
$100M - $250M
251
$50M - $100M
251
$50M - $100M
250
$15M
$250M - $500M
250
$100M - $250M
250
$100M - $250M
250
$25M - $50M
250
$25M - $50M
250
$1M - $10M
250
$1M - $10M
250
$32M
$500M - $1B
250
$106M
$100M - $250M
249
$10M - $25M
249
$1M - $10M
249
$10M - $25M
249
$1M - $10M
249
$100M - $250M
249
$10M - $25M
249
$50M - $100M
249
$250M - $500M
248
$250M - $500M
248
$500M - $1B
248
$50M - $100M
248
$1M - $10M
248
$10M - $25M
247
$1M - $10M
247
$50M - $100M
247
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 Manning College of Information and Computer Sciences, UMass Amherst, CADENAS GmbH and RigNet.
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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