Microsoft Defender MSSP Providers
Microsoft Defender is a family of security products that provides protection across endpoints, email, identity, cloud applications, and cloud workloads. The Defender product line includes Microsoft Defender for Endpoint (EDR), Defender for Office 365 (email security), Defender for Identity (AD threat detection), Defender for Cloud Apps (CASB), Defender for Cloud (cloud workload protection), and Microsoft Defender XDR for correlated cross-domain detection. Together, these products form an integrated security layer across the Microsoft ecosystem.
Microsoft Defender is broadly supported by MSSPs, reflecting its large install base across enterprise customers. Many Defender capabilities are included in Microsoft 365 E5 and similar enterprise licenses. The platform's native integration with Microsoft 365, Azure, and Entra ID provides correlated threat detection across endpoints, email, identity, and cloud workloads through the unified Defender XDR console.
Choosing an MSSP for Microsoft Defender
When evaluating Microsoft Defender MSSPs, find providers with recognized credentials like the Microsoft Solutions Partner for Security designation. That credential signals verified expertise across the Defender product family. Strong candidates need to show experience operating the full Defender stack (Endpoint, Office 365, Identity, and Cloud) along with Microsoft Sentinel for SIEM and SOAR. Microsoft frequently updates its security platforms with renamed services, portal consolidation, and new licensing structures. An experienced provider keeps your organization current without operational disruption.
Sentinel engineering expertise is a key differentiator among Microsoft-focused MSSPs. Ask providers how they design efficient log ingestion strategies to control Sentinel's consumption-based costs, build custom analytics rules, develop automated response playbooks, and integrate third-party data sources. If you run hybrid environments spanning on-premises Active Directory, Entra ID, and Azure, confirm the MSSP has experience securing both traditional Windows infrastructure and modern cloud identity systems. Whether you need fully managed security operations, co-managed Defender XDR monitoring, or help operationalizing Defender capabilities already included in your Microsoft 365 E5 licensing, go with providers who have deep Microsoft security architecture knowledge.
How to Evaluate an MSSP for Microsoft Defender
- The Defender family spans endpoint, email, identity, cloud apps, and cloud workloads. Pin down exactly which Defender products the MSSP covers operationally, since expertise in Defender for Endpoint doesn't guarantee depth in Defender for Cloud.
- Defender XDR unifies incidents across products into a single queue. Confirm whether the provider works from this unified view or monitors each Defender product in isolation, which defeats the XDR value.
- Defender policy changes can affect Microsoft 365 tenant security settings. The MSSP should coordinate with your IT administration on conditional access policies and security defaults.
- If you run both Defender and Sentinel, the provider should leverage the integration for cross-product threat hunting rather than treating them as separate monitoring streams.
- Many organizations already pay for Defender capabilities through Microsoft 365 E5 licenses. A good provider will help you activate and configure features you're entitled to but not using.
Microsoft Defender Adoption
60% of MSSPs in our dataset (240 of 401) support Microsoft Defender.
Top Microsoft Defender MSSP Providers
240 providers with Microsoft Defender experience, compared by platform depth, module coverage, response model, and service scope.
MSSPProviders.io is a structured directory of managed security providers. Listings are not ranked or endorsed.
Arctic Wolf
Best for: SMB to Enterprise orgs, Retail & E-Commerce, Manufacturing
Arctic Wolf delivers security operations as a concierge service, combining its cloud-native platform with a dedicated team of security experts assigned to each...
Darktrace
Best for: SMB to Enterprise orgs, Manufacturing, Energy & Utilities
Darktrace delivers AI-driven managed threat detection and autonomous response services, using self-learning AI to detect and respond to novel threats across dig...
eSentire
Best for: Mid-Market to Enterprise orgs, Legal, Insurance
eSentire is a global MDR leader founded in 2001, protecting 2,000+ organizations across 80+ countries with 24/7 threat detection, containment, and response.
Expel
Best for: SMB to Enterprise orgs, Technology, Retail & E-Commerce
Expel provides transparent, technology-driven managed detection and response that gives customers full visibility into how security decisions are made and threa...
Huntress
Best for: Startups to Mid-Market orgs, Legal, Education
Huntress provides managed security specifically for small and mid-size businesses and the MSPs that serve them, combining automated threat detection with human-...
Palo Alto Networks Unit 42
Best for: Mid-Market to Enterprise orgs, Retail & E-Commerce, Manufacturing
Palo Alto Networks delivers managed extended detection and response through its Cortex XMDR service, backed by Unit 42 threat research and incident response exp...
Pondurance
Best for: SMB to Mid-Market orgs, Manufacturing, Government & Public Sector
Pondurance is an Indianapolis-based MDR firm founded in 2008 with a US-only SOC model, delivering human-led threat hunting and 24/7 detection and response with...
Red Canary
Best for: SMB to Enterprise orgs, Technology, Manufacturing
Red Canary is a managed detection and response provider that delivers outcome-focused security operations, combining its proprietary detection engine with a ded...
Sophos
Best for: Startups to Enterprise orgs, Retail & E-Commerce, Manufacturing
Sophos MDR delivers managed detection and response built on the Sophos security ecosystem, offering both Sophos-native and multi-vendor environment support for...
360 SOC
Best for: Startups to Mid-Market orgs, Manufacturing, Technology
360 SOC provides AI-driven SOC-as-a-Service, delivering 24/7 threat monitoring, detection, and response at accessible price points for SMBs and MSPs.
Abacus
Best for: SMB to Mid-Market orgs, Financial Services
Abacus Group provides managed IT and cybersecurity services specifically designed for alternative investment firms, hedge funds, and private equity organization...
Accent Consulting
Best for: SMB to Mid-Market orgs, Manufacturing, Education
Accent Consulting provides managed IT and cybersecurity services to businesses in Indiana, offering proactive security monitoring and compliance support.
Accenture Security
Best for: Enterprise orgs, Retail & E-Commerce, Manufacturing
Accenture Security provides managed security services as part of its global consulting and technology practice, serving large enterprises with complex, multi-na...
Access Systems
Best for: SMB to Mid-Market orgs, Manufacturing
Access Systems is a SOC 2 Type 1 certified managed IT provider in Iowa delivering layered cybersecurity protection through their Advanced Cybersecurity Protecti...
ActZero
Best for: Startups to Mid-Market orgs, Technology, Manufacturing
ActZero provides AI-driven managed detection and response, using machine learning to deliver automated threat detection and response for SMB and mid-market orga...
Adlumin
Best for: SMB to Mid-Market orgs, Education, Government & Public Sector
Adlumin provides a managed detection and response platform purpose-built for mid-market organizations, combining SIEM, UEBA, and automated response with 24/7 ma...
AgileBlue
Best for: SMB to Enterprise orgs, Manufacturing, Technology
AgileBlue provides AI-powered SOC-as-a-Service and managed extended detection and response (MXDR) through its autonomous security operations platform.
Agio
Best for: SMB to Mid-Market orgs, Financial Services, Healthcare
Agio provides managed cybersecurity and IT services for financial services firms and healthcare organizations, with deep expertise in hedge fund, private equity...
Alert Logic
Best for: SMB to Enterprise orgs, Retail & E-Commerce, Technology
Alert Logic, now part of Fortra, provides managed detection and response with an integrated technology platform that combines SIEM, IDS, vulnerability scanning,...
Alvarez Technology
Best for: SMB to Mid-Market orgs, Manufacturing
Alvarez Technology Group provides managed IT and cybersecurity services to businesses on California's Central Coast, offering security monitoring and compliance...
AMSYS Innovative Solutions
Best for: SMB to Mid-Market orgs, Energy & Utilities, Manufacturing
AMSYS Innovative Solutions delivers managed IT and cybersecurity services to businesses in the Houston area, specializing in proactive security monitoring and c...
Ankura
Best for: Mid-Market to Enterprise orgs, Legal, Technology
Ankura provides managed cybersecurity, digital forensics, and incident response services as a global expert services firm with deep expertise in complex investi...
Appalachia Technologies
Best for: SMB to Mid-Market orgs, Manufacturing, Government & Public Sector
Appalachia Technologies provides managed IT and cybersecurity services to businesses in Pennsylvania, offering threat monitoring, compliance, and cloud solution...
Armor Defense
Best for: SMB to Enterprise orgs, Government & Public Sector, Technology
Armor Defense is a cloud-native MSSP founded in 2009 in Plano, TX, delivering managed security for cloud workloads with a strong focus on compliance, healthcare...
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