List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including Sentar Inc., Vertisystem (A MOURI Tech Company) and Ambulance Service. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$250M - $500M
389
$100M - $250M
389
$25M - $50M
388
$50M - $100M
388
$50M - $100M
388
$500M - $1B
387
$500M - $1B
387
$50M - $100M
387
$50M - $100M
387
$10M - $25M
387
$1M - $10M
387
$100M - $250M
386
$250M - $500M
386
$100M - $250M
386
$50M - $100M
386
$250M - $500M
386
$10M - $25M
386
$25M - $50M
385
$7.3M
$25M - $50M
384
$1M - $10M
384
$1B - $10B
384
$100M - $250M
384
$100M - $250M
383
$100M - $250M
383
$100M - $250M
382
$100M - $250M
382
$250M - $500M
382
$10M - $25M
382
$100M - $250M
382
$100M - $250M
382
$268M
$250M - $500M
382
$10M - $25M
382
$100M - $250M
382
$100M - $250M
382
$25M - $50M
381
$500M - $1B
381
$6.8M
$100M - $250M
381
$100M - $250M
381
$50M - $100M
381
$100M - $250M
381
$10M - $25M
381
$10M - $25M
381
$10M - $25M
380
$25M - $50M
380
$25M - $50M
380
$100M - $250M
380
$50M - $100M
380
$10M
$250M - $500M
380
$25M - $50M
380
$10M - $25M
380
$50M - $100M
380
$55M
$250M - $500M
379
$25M - $50M
379
$500M - $1B
378
$10M - $25M
378
$1.7B
$500M - $1B
378
$25M - $50M
377
$25M - $50M
377
$25M - $50M
377
$100M - $250M
377
$10M - $25M
376
$50M - $100M
376
$50M - $100M
376
$250M - $500M
376
$1M - $10M
375
$50M - $100M
375
$100M - $250M
375
$50M - $100M
375
$100M - $250M
375
$250M - $500M
375
$10M - $25M
375
$100M - $250M
374
$50M - $100M
374
$2.7B
$100M - $250M
373
$10M - $25M
373
$100M - $250M
373
$250M - $500M
373
$10M - $25M
373
$250M - $500M
373
$25M - $50M
372
$1M - $10M
372
$500M - $1B
372
$10M - $25M
372
$250M - $500M
372
$100M - $250M
372
$10M - $25M
372
$10M - $25M
372
$250M - $500M
371
$25M - $50M
371
$250M - $500M
371
$150K
$100M - $250M
371
$100M - $250M
371
$1B - $10B
371
$250M - $500M
371
$10M - $25M
371
$250M - $500M
371
$100M - $250M
370
$100M - $250M
370
$250M - $500M
369
$250M - $500M
369
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 Sentar Inc., Vertisystem (A MOURI Tech Company) and Ambulance Service.
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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