List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including Nerdio, Ubisoft Toronto and Unify Consulting. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$625M
$100M - $250M
447
$100M - $250M
447
$500M - $1B
447
$250M - $500M
447
$1B - $10B
446
$500M - $1B
446
$50M - $100M
446
$90M
$250M - $500M
446
$50M - $100M
446
$496M
$1B - $10B
446
$50M - $100M
445
$50M - $100M
445
$500M - $1B
445
$500M - $1B
445
$250M - $500M
445
$250M - $500M
445
$6.3B
$1B - $10B
444
$54K
$500M - $1B
444
$100M - $250M
444
$10M - $25M
444
$250M - $500M
444
$1B - $10B
443
$250M - $500M
443
$500M - $1B
443
$500M - $1B
443
$250M - $500M
442
$500M - $1B
442
$25M - $50M
442
$100M - $250M
442
$1M - $10M
441
$100M - $250M
441
$50M - $100M
440
$1B - $10B
440
$1.6B
$250M - $500M
440
$250M - $500M
439
$100M - $250M
438
$1M - $10M
438
$10M - $25M
438
$1B - $10B
437
$100M - $250M
437
$25M - $50M
437
$10M - $25M
437
$10M - $25M
437
$25M - $50M
436
$25M - $50M
436
$50M - $100M
436
$250M - $500M
436
$250M - $500M
436
$1B - $10B
436
$500M - $1B
435
$10M - $25M
435
$1M - $10M
435
$1M
$50M - $100M
435
$100M - $250M
435
$10M - $25M
435
$500M - $1B
434
$100M - $250M
434
$10M - $25M
434
$250M - $500M
434
$10M - $25M
434
$500M - $1B
434
$250M - $500M
434
$100M - $250M
433
$500M - $1B
433
$250M - $500M
433
$18M
$100M - $250M
433
$25M - $50M
433
$10M - $25M
432
$100M - $250M
431
$10M - $25M
431
$25M - $50M
431
$250M - $500M
431
$1M - $10M
430
$158M
$100M - $250M
430
$25M - $50M
430
$1M - $10M
429
$1.8B
$250M - $500M
429
$50M - $100M
429
$25M - $50M
429
$500M - $1B
428
$1.6M
$50M - $100M
428
$1M - $10M
428
$10M - $25M
428
$25M - $50M
427
$100M - $250M
427
$50M - $100M
427
$1B - $10B
426
$50M - $100M
426
$100M - $250M
425
$1M - $10M
425
$50M - $100M
425
$50M - $100M
425
$95M
$100M - $250M
424
$25M - $50M
424
$25M - $50M
423
$250M - $500M
423
$250M - $500M
422
$159M
$100M - $250M
422
$250M - $500M
422
$100M - $250M
422
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 Nerdio, Ubisoft Toronto and Unify Consulting.
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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