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Microsoft

Microsoft Corporation

Vendor

Microsoft is the largest security vendor in this index by installed base, and almost none of that was bought deliberately: Microsoft Defender Antivirus is built into Windows and switched on by default, so it protects any machine whose owner has not installed something else. That changes how its results should be read — it is the baseline every other product in this index is implicitly compared against. The paid products are a different thing from the built-in one. Microsoft Defender for Endpoint adds detection and response, threat and vulnerability management and central policy to the same engine; Microsoft Defender for Business is the smaller-organisation edition; Microsoft Defender XDR correlates signals across endpoints, identity, email and cloud apps; and Microsoft Sentinel is the SIEM above them. Microsoft Defender for Individuals, included with Microsoft 365, is the consumer application. Microsoft enters the public test cycles regularly, and its results are among the most consistently available in this index — useful, because for many readers the real question is not which product is best in the abstract but whether a paid product beats the one already installed.

Country
United States
Headquarters
Redmond, United States
Year Established
1975
Employees
223,000
Customers
1.6M organisations (2026)Vendor states: Microsoft Security Blog
Users
1.4B devices protected (2026)Estimated by LLM
Revenue
$331.8B (2026)Vendor states: Web search — Microsoft
Status
Active

Support locations

Support in 153 countries on 6 continents

AngolaAlbaniaUnited Arab EmiratesArgentinaArmeniaAustraliaAustriaAzerbaijanBelgiumBangladeshBulgariaBosnia & HerzegovinaBelizeBoliviaBrazilBruneiBotswanaCanadaSwitzerlandChinaCôte d’IvoireCameroonColombiaCosta RicaCzechiaGermanyDenmarkDominican RepublicAlgeriaEcuadorEgyptEstoniaFinlandUnited KingdomGeorgiaGhanaGreeceGreenlandGuatemalaGuyanaHondurasCroatiaHaitiHungaryIndonesiaIndiaIrelandIcelandIsraelItalyJamaicaJordanJapanKazakhstanKenyaKyrgyzstanCambodiaSouth KoreaKuwaitLaosLebanonLibyaSri LankaLithuaniaLuxembourgLatviaMoroccoMoldovaMexicoNorth MacedoniaMyanmar (Burma)MontenegroMozambiqueMalaysiaNamibiaNigeriaNicaraguaNorwayOmanPakistanPanamaPeruPhilippinesPolandParaguayPalestinian TerritoriesQatarRomaniaSaudi ArabiaSenegalSierra LeoneEl SalvadorSerbiaSurinameSlovakiaSloveniaSwedenThailandTimor-LesteTunisiaTürkiyeTaiwanTanzaniaUgandaUkraineUruguayVenezuelaVietnamZimbabweSouth AfricaNew ZealandChilePortugalSpainFranceUnited StatesFrench GuianaArubaAnguillaAntigua & BarbudaBahrainBahamasBermudaBarbadosCuraçaoCayman IslandsCyprusDominicaFalkland IslandsGrenadaGuamSt. Kitts & NevisSt. LuciaSt. MartinMaltaMontserratMauritiusPuerto RicoSão Tomé & PríncipeSint MaartenTurks & Caicos IslandsTrinidad & TobagoSt. Vincent & GrenadinesBritish Virgin IslandsU.S. Virgin IslandsMartiniqueGuadeloupe
Headquarters · Redmond, United States Support location Country with support
North America38 countries
AnguillaAntigua & BarbudaArubaBahamasBarbadosBelizeBermudaBritish Virgin IslandsCanadaCaribbean NetherlandsCayman IslandsCosta RicaCuraçaoDominicaDominican RepublicEl SalvadorGreenlandGrenadaGuadeloupeGuatemalaHaitiHondurasJamaicaMartiniqueMexicoMontserratNicaraguaPanamaPuerto RicoSint MaartenSt. Kitts & NevisSt. LuciaSt. MartinSt. Vincent & GrenadinesTrinidad & TobagoTurks & Caicos IslandsU.S. Virgin IslandsUnited States
South America14 countries
ArgentinaBoliviaBrazilChileColombiaEcuadorFalkland IslandsFrench GuianaGuyanaParaguayPeruSurinameUruguayVenezuela
Europe40 countries
AlbaniaAndorraAustriaBelgiumBosnia & HerzegovinaBulgariaCroatiaCyprusCzechiaDenmarkEstoniaFinlandFranceGermanyGreeceHungaryIcelandIrelandItalyLatviaLithuaniaLuxembourgMaltaMoldovaMontenegroNorth MacedoniaNorwayPolandPortugalRomaniaSan MarinoSerbiaSlovakiaSloveniaSpainSwedenSwitzerlandTürkiyeUkraineUnited Kingdom
Asia36 countries
ArmeniaAzerbaijanBahrainBangladeshBruneiCambodiaChinaGeorgiaHong Kong SAR ChinaIndiaIndonesiaIsraelJapanJordanKazakhstanKuwaitKyrgyzstanLaosLebanonMacao SAR ChinaMalaysiaMyanmar (Burma)OmanPakistanPalestinian TerritoriesPhilippinesQatarSaudi ArabiaSingaporeSouth KoreaSri LankaTaiwanThailandTimor-LesteUnited Arab EmiratesVietnam
Africa22 countries
AlgeriaAngolaBotswanaCameroonCôte d’IvoireEgyptGhanaKenyaLibyaMauritiusMoroccoMozambiqueNamibiaNigeriaSão Tomé & PríncipeSenegalSierra LeoneSouth AfricaTanzaniaTunisiaUgandaZimbabwe
Oceania3 countries
AustraliaGuamNew Zealand

Where the vendor offers local support — a support centre, an office it lists, or a local support line (shown as the country alone) — from the vendor’s own site. Partners and resellers are not counted.

Products

ProductCategoryMarketPlatform & VersionFree / Paid
Azure FirewallNetwork FirewallEnterprise, SMBCloudPaid
Microsoft Configuration ManagerPatch ManagementEnterpriseWindows:5.00.8634.1000Paid
Microsoft Defender for BusinessSmall Business AntimalwareSMBAndroidiOSmacOSWindowsPaid
Microsoft Defender for EndpointEnterprise AntimalwareEnterpriseLinux:101.68.80macOS:101.26032.0016Windows:10.0.28000.3086Paid
Microsoft IntunePatch ManagementEnterprise, Government, Mid-Market, SMBLinuxmacOSWindowsWindows ServerPaid
System Center Endpoint ProtectionEnterprise AntimalwareEnterprisemacOS:4.5.22.0Windows:4.7Paid
Windows DefenderHome AntimalwareConsumer, Enterprise, SMBWindows:6.1Free
Windows Server Update Services (WSUS)Patch ManagementEnterprise, Mid-Market, SMBWindowsWindows ServerFree

Certifications

Common Criteria

OPSWAT Certified Security Application

Recent test results

AV-Comparatives

Recent changes

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