List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including Regis Jesuit High School, Skaylink and SteerBridge. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$1M - $10M
273
$25M - $50M
273
$100M - $250M
273
$10M - $25M
273
$100M - $250M
273
$100M - $250M
272
$10M - $25M
272
$250M - $500M
272
$50M - $100M
272
$100M - $250M
272
$50M - $100M
272
$25M - $50M
271
$10M - $25M
271
$10M - $25M
271
$250M - $500M
271
$100M - $250M
271
$250M - $500M
271
$100M - $250M
271
$50M - $100M
271
$50M - $100M
270
$500M - $1B
270
$250M - $500M
270
$27M
$100M - $250M
270
$10M - $25M
270
$48M
$100M - $250M
269
$10M
$10M - $25M
269
$1.1M
$10M - $25M
269
$100M - $250M
269
$1M - $10M
268
$100M - $250M
268
$1.8B
$500M - $1B
268
$10M - $25M
268
$1M - $10M
268
$50M - $100M
268
$50M - $100M
268
$1M - $10M
268
$500M - $1B
268
$1M - $10M
267
$50M - $100M
267
$250M - $500M
267
$255M
$100M - $250M
267
$100M - $250M
267
$10M - $25M
267
$10M - $25M
267
$1B - $10B
267
$100M - $250M
267
$50M - $100M
266
$190M
$250M - $500M
266
$100M - $250M
266
$25M - $50M
266
$100M - $250M
266
$50M - $100M
266
$25M - $50M
266
$100M - $250M
265
$500M - $1B
265
$100M - $250M
265
$100M - $250M
265
$438M
$10M - $25M
265
$1B
$100M - $250M
265
$50M - $100M
265
$100M - $250M
265
$25M - $50M
265
$1M - $10M
264
$25M - $50M
264
<$1M
264
$25M - $50M
264
$100M - $250M
264
$50M - $100M
264
$100M - $250M
264
$1M - $10M
263
$50M - $100M
263
$25M - $50M
263
$500M - $1B
263
$1B - $10B
263
$805M
$1B - $10B
263
$25M - $50M
263
$100M - $250M
262
$1B - $10B
262
$1M - $10M
262
$25M - $50M
262
$100M - $250M
262
$100M - $250M
262
$25M - $50M
261
$250M - $500M
261
$10M - $25M
261
$12M
$100M - $250M
261
$100M - $250M
261
$250M - $500M
261
$100M - $250M
261
$1M - $10M
261
$100M - $250M
260
$250M - $500M
260
$100M - $250M
260
$50M - $100M
260
$169K
$50M - $100M
260
$500M - $1B
260
$100M - $250M
260
$100M - $250M
260
$250M - $500M
259
$26M
$50M - $100M
259
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 Regis Jesuit High School, Skaylink and SteerBridge.
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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