List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including RELI Group, Inc., Rocket Factory Augsburg - RFA and VetsEZ. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$100M - $250M
361
$37M
$25M - $50M
361
$250M - $500M
361
$25M - $50M
360
$100M - $250M
360
$11M
$500M - $1B
360
$1M - $10M
359
$25M - $50M
359
$10M - $25M
359
$25M - $50M
359
$100M - $250M
358
$1M - $10M
358
$50M - $100M
358
$250M - $500M
357
$3.3M
$1M - $10M
357
$500M - $1B
357
$100M - $250M
357
$50M - $100M
357
$500M - $1B
357
$100M - $250M
357
$250M - $500M
356
$100M - $250M
356
$25M - $50M
356
$25M - $50M
356
$100M - $250M
356
$100M - $250M
355
$50M - $100M
355
$100M - $250M
355
$25M - $50M
354
$100M - $250M
354
$100M - $250M
354
$25M - $50M
354
$1B - $10B
354
$1B - $10B
354
$1B - $10B
354
$25M - $50M
353
$500M - $1B
353
$25M - $50M
353
$10M - $25M
353
$250M - $500M
353
$500M - $1B
353
$50M - $100M
353
$100M - $250M
352
$10M - $25M
352
$250M - $500M
352
$250M - $500M
351
$50M - $100M
351
$50M - $100M
351
$100M - $250M
350
<$1M
350
$100M - $250M
350
$10M - $25M
350
$1M - $10M
350
$25M - $50M
350
$50M - $100M
349
$25M - $50M
349
$250M - $500M
349
$1M - $10M
349
$100M - $250M
349
$250M - $500M
348
$1.5B
$25M - $50M
348
$57M
$10M - $25M
348
$50M - $100M
348
$250M - $500M
348
$144M
$50M - $100M
347
$50M - $100M
347
$25M - $50M
347
$25M - $50M
347
$1.2M
$500M - $1B
347
$25M - $50M
347
$100M - $250M
347
$10M - $25M
347
$100M - $250M
345
$10M - $25M
345
$250M - $500M
345
$250M - $500M
345
$25M - $50M
345
$1B - $10B
344
$25M - $50M
344
$65M
$50M - $100M
343
$26M
$100M - $250M
343
$1M - $10M
343
$498M
$50M - $100M
343
$100M - $250M
343
$1B - $10B
343
$50M - $100M
343
$100M - $250M
342
$1M - $10M
342
$25M - $50M
342
$500M - $1B
341
$100M - $250M
341
$100M - $250M
341
$100M - $250M
341
$50M - $100M
340
$10M - $25M
340
$25M - $50M
340
$1B - $10B
340
$250M - $500M
339
$250M - $500M
339
$100M - $250M
339
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 RELI Group, Inc., Rocket Factory Augsburg - RFA and VetsEZ.
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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