List of Companies Using Microsoft Defender
Prospecting companies using Microsoft Defender? Here they are, biggest first, including MER Group, Toastmaster International and Arkansas Department of Education. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$1.1M
$100M - $250M
487
$50M - $100M
487
$38M
$250M - $500M
486
$10M - $25M
486
$1B - $10B
486
$50M - $100M
486
$25M - $50M
485
$81M
$50M - $100M
485
$20M
$50M - $100M
485
$250M - $500M
485
$10M - $25M
484
$25M - $50M
484
$500M - $1B
484
$250M - $500M
484
$100M - $250M
484
$250M - $500M
484
$25M - $50M
484
$10M - $25M
484
$100M - $250M
483
$250M - $500M
483
$250M - $500M
483
$50M - $100M
482
$250M - $500M
482
$250M - $500M
482
$1B - $10B
482
$25M - $50M
482
$10M - $25M
482
$25M - $50M
482
$500M - $1B
481
$100M - $250M
481
$100M - $250M
481
$500M - $1B
481
$250M - $500M
480
$10M - $25M
480
$283M
$500M - $1B
480
$250M - $500M
480
$25M - $50M
480
$50M - $100M
479
$500M - $1B
479
$1B - $10B
478
$50M - $100M
478
$250M - $500M
477
$100M - $250M
477
$1M - $10M
476
$1B - $10B
476
$500M - $1B
476
$10M - $25M
475
$25M - $50M
475
$1M - $10M
475
$338M
$25M - $50M
475
$15M
$1B - $10B
475
$100M - $250M
474
$25M - $50M
474
$50M - $100M
474
$1M - $10M
473
$250M - $500M
473
$50M - $100M
472
$580M
$100M - $250M
471
$250M - $500M
471
$10M - $25M
471
$1.2B
$50M - $100M
471
$100M - $250M
471
$1M - $10M
471
$500M - $1B
471
$25M - $50M
471
$500M - $1B
470
$25M - $50M
470
$100M - $250M
470
$25M - $50M
469
$10M - $25M
469
$500M - $1B
468
$100M - $250M
468
$50M - $100M
468
$10M - $25M
467
$25M - $50M
467
$1M - $10M
467
$110M
$250M - $500M
466
$25M - $50M
466
$190M
$100M - $250M
466
$250M - $500M
466
$29M
$100M - $250M
466
$100M - $250M
466
$100M - $250M
465
$250M - $500M
465
$250M - $500M
465
$330M
$500M - $1B
465
$100M - $250M
464
$25M - $50M
464
$1B - $10B
464
$100M - $250M
464
$100M - $250M
464
$10M - $25M
463
$100M - $250M
463
$250M - $500M
463
$50M - $100M
462
$50M - $100M
462
$1B - $10B
462
$100M - $250M
461
$25M - $50M
460
$250M - $500M
460
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 MER Group, Toastmaster International and Arkansas Department of Education.
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.
Search by Industry
ConstructionIT Services and IT ConsultingSoftware DevelopmentFinancial ServicesReal EstateHospitals and Health CareAdvertising ServicesNon-profit OrganizationsInsuranceLaw PracticeRetailWellness and Fitness ServicesBusiness Consulting and ServicesEducation Administration ProgramsMotor Vehicle ManufacturingTechnology, Information and InternetFood and Beverage ServicesStaffing and RecruitingAccountingOil and GasHospitalityAppliances, Electrical, and Electronics ManufacturingManufacturingArchitecture and PlanningMachinery Manufacturing
Search by Country
United StatesUnited KingdomCanadaGermanyAustraliaFranceNetherlandsIndiaSpainSwitzerlandItalySwedenBrazilBelgiumSingaporeIrelandUnited Arab EmiratesDenmarkSouth AfricaIsraelNew ZealandNorwayFinland
Search by Technology
Top companies by employee count
Top companies in United States by employee countTop companies in United Kingdom by employee countTop companies in Canada by employee countTop companies in Germany by employee countTop companies in France by employee countTop companies in Australia by employee countTop companies in Netherlands by employee countTop companies in India by employee countTop companies in Spain by employee countTop companies in Switzerland by employee countTop companies in Sweden by employee countTop companies in Italy by employee countTop companies in Denmark by employee countTop companies in Brazil by employee countTop companies in Ireland by employee count
1-888-653-2347 
support@leadiq.com © LeadIQ, Inc. All rights reserved.
