List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including Kestra Financial, Lone Star Circle of Care and Quooker. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$250M - $500M
460
$100M - $250M
460
$1M - $10M
460
$156M
$1B - $10B
460
$100M - $250M
460
$25M - $50M
459
$220M
$50M - $100M
459
$10M - $25M
458
$500M - $1B
458
$250M - $500M
458
$100M - $250M
458
$100M - $250M
458
$500M - $1B
458
$50M - $100M
457
$250M - $500M
457
$500M - $1B
457
$10M - $25M
457
$100M - $250M
456
$250M - $500M
456
$500M - $1B
456
$50M - $100M
456
$250M - $500M
456
$500M - $1B
456
$500M - $1B
455
$1.4M
$10M - $25M
455
$100M - $250M
455
$250M - $500M
455
$50M - $100M
454
$515M
$250M - $500M
454
$100M - $250M
454
$250M - $500M
454
$166M
$100M - $250M
453
$50M - $100M
453
$50M - $100M
452
$500M - $1B
452
$10M - $25M
452
$1B - $10B
452
$250M - $500M
452
$250M - $500M
452
$1M - $10M
451
$100M - $250M
451
$1B - $10B
451
$50M - $100M
450
$50M - $100M
450
$500M - $1B
450
$500M - $1B
450
$496M
$25M - $50M
450
$1M - $10M
449
$25M - $50M
449
$100M - $250M
448
$1B - $10B
448
$105M
$250M - $500M
448
$25M - $50M
447
$1B - $10B
447
$50M - $100M
447
$50M - $100M
447
$25M - $50M
447
$500M - $1B
447
$1M - $10M
447
$100M - $250M
447
$250M - $500M
447
$50M - $100M
446
$6.3B
$1B - $10B
446
$90M
$250M - $500M
446
$250M - $500M
446
$100M - $250M
446
$10M - $25M
445
$50M - $100M
445
$1M - $10M
445
$500M - $1B
444
$250M - $500M
444
$1M - $10M
443
$50M - $100M
443
$1B - $10B
443
$10B+
443
$500M - $1B
443
$100M - $250M
442
$10M - $25M
442
$500M - $1B
442
$100M - $250M
440
$1B - $10B
440
$250M - $500M
440
$100M - $250M
440
$1M - $10M
439
$500M - $1B
439
$250M - $500M
439
$1M - $10M
438
$25M - $50M
438
$100M - $250M
438
$500M - $1B
437
$10M - $25M
437
$1M - $10M
437
$10M - $25M
437
$25M - $50M
437
$250M - $500M
436
$250M - $500M
436
$100M - $250M
436
$625M
$100M - $250M
436
$250M - $500M
436
$100M - $250M
435
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 Kestra Financial, Lone Star Circle of Care and Quooker.
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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