MDR providers for Microsoft Defender
If Defender is already deployed, the shortlist depends on whether you want Microsoft-only operations, an independent MDR layer, MSP delivery or a services firm with incident response depth.
Shortlist by operating model
Microsoft-native
Defender XDR and Sentinel are the security workspace.
Risk: Weak fit if another EDR may stay in the environment.
Independent MDR
Keep Defender as telemetry, but avoid a Microsoft-only MDR model.
Risk: Confirm response actions, threat hunting and log access.
SMB or MSP-led
Small environments or MSP-managed clients.
Risk: Usually weaker for enterprise SIEM ownership or raw-query access.
Enterprise / IR-heavy
MDR plus incident response depth or procurement support.
Risk: Expect custom scope, higher cost and slower procurement.
| Model | Fits when | Providers to check | Risk |
|---|---|---|---|
| Microsoft-native | Defender XDR and Sentinel are the security workspace. | Weak fit if another EDR may stay in the environment. | |
| Independent MDR | Keep Defender as telemetry, but avoid a Microsoft-only MDR model. | Confirm response actions, threat hunting and log access. | |
| SMB or MSP-led | Small environments or MSP-managed clients. | Usually weaker for enterprise SIEM ownership or raw-query access. | |
| Enterprise / IR-heavy | MDR plus incident response depth or procurement support. | Expect custom scope, higher cost and slower procurement. |
Checks that change the shortlist
If yes, pricing can move from endpoint MDR to log-volume and retention decisions.
Microsoft-native providers may operate in your tenant; others may shift work into their own portal.
Actual containment through Defender is different from sending instructions to your team.
Defender for Business, Defender for Endpoint P2 and E5 shops may not be supported the same way.
Defender details to verify
- −Check whether the provider operates only on Defender for Endpoint or also covers Defender XDR, Sentinel and Entra ID.
- −Ask whether incidents stay in your Microsoft tenant or move into the provider portal.
- −Confirm whether analysts can isolate devices and block indicators through Defender, or only send instructions.
- −Check whether Defender for Business is supported, or whether Defender for Endpoint Plan 2 is required.
All 75 providers mentioning Defender
AirMDR*
AI-native architecture with 240+ integrations (vendor-claimed) and aggressive trial terms. Best for cost-conscious SMBs willing to adopt early-stage AI automation. The trade-off is vendor maturity, zero public reviews and opaque pricing.
Arctic Wolf
The Concierge Security Team model is Arctic Wolf's core differentiator: a named team that knows your environment and provides proactive security reviews. Technology-agnostic design avoids vendor lock-in, and the $3M warranty is the industry's largest. The trade-off is limited data transparency, guided (not hands-on) remediation, no published detection benchmarks, and a 71% false alarm rate by their own reporting.
Armor
Armor's niche is regulated cloud workloads where Microsoft Sentinel is already deployed. Compliance consulting in HIPAA, PCI, and HITRUST is a genuine differentiator. The trade-off: you are locked into both the Trend Micro agent and the Microsoft security stack, and there is almost no independent review data to validate the service quality.
Avertium
Technology-agnostic MDR with deep Microsoft, LogRhythm, and SentinelOne expertise. Compliance consulting and threat hunting are included in the base service. Co-managed guided response model, not autonomous remediation. Best for mid-market buyers already on one of these platforms who want relationship-driven service with input on response decisions. Trade-off: no published detection metrics, no breach warranty, DFIR is a separate engagement, and limited third-party validation compared to larger MDR providers.
Barracuda Networks
Purpose-built for the MSP channel with multi-tenant management, SentinelOne-powered endpoint security, and a 24/7 global SOC. Natural fit for MSPs serving SMB clients who need turnkey XDR. Less proven for direct enterprise buyers. Detection claims lack independent validation and security logs are not downloadable.
Binary Defense
Binary Defense's core differentiator is proactive threat hunting with an attacker's mindset, consistently earning the highest Forrester scores in that category. The open XDR approach works with your existing tools and emphasizes data portability. The trade-off is US-only SOC operations, no published detection metrics, and some reports of declining service quality as the company scales.
Blackpoint Cyber
MSP-channel MDR with autonomous SOC response (self-reported 7-16 min MTTR) and patented network visualization. Trade-offs: MSP-only sales model, limited portal transparency, no approval controls, no MITRE validation.
BlueVoyant
The strongest Microsoft Sentinel MDR option for organizations that want their detection rules, playbooks, and data to stay in their own environment. No proprietary agent, no data lock-in, well-funded ($700M+), and credible founding team. Trade-off: narrow integration breadth outside the Microsoft and Splunk ecosystems, no published response SLAs, and very limited public reviews to validate performance claims.
Bridewell
Strong choice for UK/EU Critical National Infrastructure needing Microsoft-native MDR with NCSC/CREST credentials and OT/ICS expertise. Trade-offs: Microsoft platform dependency, limited pricing transparency, no breach warranty, no published detection metrics, and integration uncertainty following I-Tracing merger.
ConnectWise*
Good fit for MSPs already running ConnectWise PSA and RMM who want integrated MDR with multi-EDR flexibility. The trade-off is ecosystem lock-in, limited independent validation, and an immature SIEM layer.
Critical Start
Technology-agnostic MDR with TBR deterministic alert auto-resolution, 100+ integrations, OT/ICS support and two-person response validation. Participated in MITRE Engenuity managed services evaluation (2022 Round 1 only, not 2024 Round 2). Trade-off is fully opaque pricing, enterprise focus, no breach warranty and no Slack integration.
CyberCX
Regional ANZ leader with 9 CREST-accredited SOCs, ~1,400 security professionals, and Microsoft Advanced Specializations. Best suited for ANZ organizations already invested in or moving to the Microsoft security ecosystem. The trade-off: deep Microsoft expertise and strong regional presence vs. no autonomous response capability, no published metrics, and Accenture integration uncertainty.
CyberMaxx
Healthcare-focused MDR with a Zero-Latency Response model and 24x7x365 threat responders. Technology-agnostic, works with existing CrowdStrike, SentinelOne, or Microsoft Defender. Three acquisitions in two years show growth ambition. Trade-offs: no published detection metrics, incident response and threat hunting are separate costs, and very limited independent community validation.
CyberOne
CyberOne is a credible UK Microsoft-stack specialist with CREST, NCSC, and Microsoft Verified MXDR credentials that matter for regulated UK buyers. Data stays in your own tenant, and the tiered pricing makes the service accessible to mid-market organisations. Trade-offs are meaningful: no peer reviews, no published detection metrics, no IR inclusion, and no coverage outside the Microsoft ecosystem.
Cyderes
Technology-agnostic MDR built on Google Chronicle with deep identity security integrations and three delivery models (client-managed through fully managed). Trade-off: opaque pricing, almost no public reviews, and a complex corporate history from multiple mergers.
Cyrebro
Vendor-neutral MDR with its own detection engine and SOAR, fast deployment, and reported low false positive rates. Trade-off: single-region SOC, limited brand recognition, and support quality concerns noted in reviews.
Darktrace
AI-powered threat detection through Self-Learning AI that adapts to each environment's behavioral patterns, combined with Antigena autonomous response that contains threats in seconds. Broad attack surface coverage and technology-agnostic architecture suit complex environments. Trade-offs: premium pricing, high false positive tuning burden, steep learning curve, and the MDR service is new (June 2024) with limited independent reviews.
Daylight Security
AI-native MDR that combines an agentic platform with a team of security experts with IR and threat hunting experience in a follow the sun model across the globe. Best suited for organizations with modern tech stack.
DeepSeas
Technology-agnostic MDR with OT/ICS coverage, which is rare in this market. Ideal for mid-market and enterprise buyers with attack surfaces spanning IT, cloud, and operational technology. Trade-off: no in-house incident response (uses external DFIR partners) and zero pricing transparency.
Deepwatch
SIEM-centric, vendor-agnostic MDR with patented DRS engine (98% FP reduction claim), dedicated Squad team per customer, and deep Splunk/Chronicle/Sentinel/Securonix expertise. Organizational instability (CEO change, 42% headcount cut, negative employee reviews) warrants explicit due diligence on service continuity.
Defendable
Defendable MDR fits Nordic buyers that want Norwegian SOC monitoring, Microsoft Sentinel-friendly operations, proactive threat hunting and incident-response depth. The main diligence items are custom pricing, log retention cost, response authority and where MDR ends versus the incident-response retainer.
DefenseStorm
DefenseStorm is a strong vertical MDR candidate for U.S. banks and credit unions because it combines 24/7 banking SOC support, GRID Active detection, EDR integrations and examiner-aligned evidence. The trade-offs are a narrow vertical fit, custom pricing, limited public detail on contractual SLAs, and a collaborative response model where the customer makes final decisions.
Devoteam*
Devoteam Cloud MDR is strongest for cloud-first organizations that want Sentinel-centered SIEM operations and managed cloud security from a large EMEA services firm. The main diligence items are Sentinel and cloud log costs, response authority, SOC delivery model, endpoint response coverage, contractual SLAs and offboarding rights.
e2e-assure
UK-focused MDR with SC-cleared analysts and deep Microsoft expertise, purpose-built for critical infrastructure and government sectors. Automated containment (endpoint isolation, account disabling) triggers on critical threats, with analyst investigation within one hour. Trade-offs: remediation beyond containment is guided (customer executes), incident response is a separate partner-delivered service, detection metrics are tracked internally but not published, and pricing minimums are not disclosed.
eSentire
eSentire excels at active, hands-on response and publicly reports 15-minute containment. The multi-signal Atlas XDR platform and dedicated threat hunters make it a strong choice for organizations that want their MDR provider to take direct action across endpoint, network, cloud, and identity surfaces.
Eviden
Fits European and Middle East enterprise buyers that already work with Atos or want a multinational services firm running their MDR. Pure-play competitors will move faster on SMB and mid-market deals.
Expel
API-first, vendor-agnostic MDR with 160+ integrations and full transparency into every SOC action via Workbench. Ideal for tech-forward organizations that want to keep their existing security tools and add a managed detection layer. Trade-off: threat hunting and incident response are add-ons, not included in base pricing, and no breach warranty.
Eye Security
European MDR with intelligence-agency pedigree and an optional cyber insurance bundle through Eye Underwriting. Runs on Microsoft Defender and Sentinel. Trade-offs: no published detection benchmarks, limited public reviews and Europe-only coverage.
Foresite Cybersecurity*
Google Cloud SecOps specialist with deep Chronicle SIEM and compliance automation expertise. Best for mid-market GCP customers needing CMMC/HIPAA/PCI alignment with managed detection. Trade-offs: human-in-the-loop response slows containment vs. autonomous platforms, high upfront deployment costs ($25K-$100K), single SOC site in Kansas with no geographic redundancy, and limited public documentation of specific response actions.
GoSecure
Bundles endpoint, network, email, and AD identity detection in a single platform with published per-endpoint pricing. DHS CDM APL listing adds government credibility. Trade-off: almost no public reviews exist, and the platform-native architecture requires the Titan EDR agent despite 'open XDR' positioning.
Gradient Cyber
Mid-market specialist that owns its platform, SOC, and analyst team. 99% false positive elimination and 10:1 analyst ratio (both vendor-published) prioritize signal quality over noise. Active response capability includes endpoint isolation, process termination, quarantine, and rollback through integrated EDR agents, with response authority configurable per pre-agreed policies. Also covers maritime OT environments. Limited community feedback and no published detection speed metrics make independent validation difficult.
Hitachi Cyber
Reasonable fit for organizations already inside the Hitachi ecosystem or those that want one vendor covering IT and OT across multiple regions. Buyers shopping on transparent metrics or community reputation will find thinner public evidence than the major pure-play MDRs offer.
Huntress
The most recommended MDR on r/msp for SMB environments. Human-led SOC with <1% false positive rate and 8-minute MTTR, follow-the-sun coverage, and a multi-product platform that consolidates EDR, identity, SIEM, and training under one vendor.
InfoGuard
InfoGuard fits DACH buyers that want a Swiss services firm to run MDR, co-managed SOC and CSIRT-backed response. The main diligence items are custom pricing, exact response authority, named tool integrations and whether incident-response retainer scope is bundled or separate.
Innofactor MDRaaS
Innofactor MDRaaS fits Microsoft-heavy Nordic buyers that want Sentinel-based monitoring while keeping logs and incidents in their own Azure environment. The trade-offs are custom pricing, endpoint and network add-ons plus response authority that needs explicit contract language.
Integrity360
CREST-accredited European MDR with seven SOCs and a proprietary detection platform that works with the customer's existing tools. Backed by August Equity with an active acquisition strategy (nine acquisitions in four years). Trade-off: no published detection metrics, virtually zero community review presence, and North American coverage is limited to a January 2026 Canadian acquisition.
Intezer*
AI-first approach to SOC operations delivers sub-minute triage across all alerts. Genetic malware analysis adds code-lineage context that signature-based detection misses. Per-endpoint pricing keeps costs predictable as alert volume grows. The trade-off: escalated alerts go to your team (not Intezer), so you need internal SOC staff or the CarbonHelix partnership.
ITC Secure
ITC Secure fits buyers that want Microsoft-centered MXDR with Pulse portal visibility, service reporting and advisory depth from the same provider. The main diligence items are custom pricing, exact component inclusion, response authority and how much incident response is included versus sold separately.
Kroll
Kroll Responder's differentiator is depth of real-world IR experience: 3,000+ annual breach investigations feeding detection and response. This is a services firm with MDR, not an MDR vendor with services. Complete Response methodology, included $1M breach warranty, and direct escalation to IR/forensics teams set it apart. December 2025 CrowdStrike migration brings faster response but increases platform dependency.
Kudelski Security
Technology-agnostic MDR with strong analyst recognition (Gartner 8 years, Forrester, Bloor) and one of the few dedicated OT/ICS MDR offerings on the market. Swiss parent company adds stability. The trade-off: almost no community validation, no public pricing, and detection metrics that haven't been independently tested.
LevelBlue
The largest pure-play MSSP by revenue ($1B+) with the deepest compliance credentials in MDR (FedRAMP, PCI DSS QSA, StateRAMP) and SpiderLabs, a 1,000+ person offensive security team. Cybereason's 100% MITRE ATT&CK detection adds real substance. Trade-off: five acquisitions in two years created a fragmented portfolio of unintegrated platforms, and integration execution remains unproven.
LRQA Nettitude
LRQA Nettitude is strongest where MDR is part of a wider assurance, testing and incident-response program. CREST SOC certification, broad CREST accreditations and current NCSC CIR assurance make it credible for regulated and UK buyers. The trade-off is a custom, scope-dependent service with limited public detail on pricing, response authority, SOC locations and measured detection performance.
Lumifi
PE-backed MDR roll-up with healthcare specialization, ex-military SOC personnel, and a technology-agnostic approach. ShieldVision provides 1,000+ playbooks for automation. The core trade-offs: no published detection metrics, no independent analyst recognition, zero pricing transparency, a 2.9/5 Glassdoor employee rating, and integration risk from absorbing three companies in just over a year. IR and OT/ICS are separate add-ons.
Mandiant
Threat intelligence-driven MDR backed by 500+ intel analysts, frontline IR experience, and Google Cloud infrastructure. Best for enterprises facing sophisticated threats who need detection backed by the organization that publishes the industry's most-cited threat intelligence report (M-Trends). Premium pricing and separate IR retainer are the main trade-offs.
mnemonic
mnemonic MDR fits European buyers that want an Argus-based service with Microsoft, CrowdStrike, Wiz, network and OT-oriented coverage. The trade-off is commercial opacity, since public materials do not publish prices, fixed SLA terms, warranty terms or all standard containment actions.
NCC Group
Consultancy-backed MXDR with Fox-IT's 20+ year SOC heritage and embedded IR team. Best for European enterprise and government buyers running Sentinel or Splunk who want detection depth and IR capability in one provider. Forrester and IDC both recognize the technical quality. Trade-off: only two SIEMs supported, no public reviews from MDR customers, no breach warranty, and MDR is one of many NCC Group business lines.
Nomios
Nomios MDR fits European buyers that value EU data hosting, a visitable Dutch SOC and a choice between packaged Cortex XDR MDR and a custom service around existing tools. The trade-off is pricing and SLA opacity: tiers are public, but amounts, service-credit language and breach warranty terms are not.
NRI SecureTechnologies
Reasonable fit for organizations with Japan operations that want a Japanese-rooted SOC and a deep CrowdStrike-managed service. Buyers shopping on transparent metrics or community reviews will find thinner public evidence than pure-play Western MDRs offer.
NTT Security Holdings
Global SOC coverage, OT/ICS monitoring, and threat intelligence from 40% of global IP prefixes. Vendor-agnostic and works with existing tools. Trade-offs: active response limited to endpoint isolation, no published detection metrics, premium pricing, and regional inconsistency in service quality.
NVISO
NVISO MDR fits European buyers that want a security-operations partner with MDR, CSIRT, threat hunting and advisory depth rather than a narrow endpoint-only service. The trade-off is commercial opacity, since pricing, fixed SLA terms, breach warranty and named containment actions are not published.
Obrela
Good fit for European/MENA buyers who need OT or maritime MDR and are comfortable with a Microsoft-centric stack. Gartner and Forrester recognize them, and they publish operational metrics most competitors keep private. Trade-off: zero public customer reviews, completely opaque pricing across four tiers, threat hunting as an upsell, and no SOC presence outside Europe/MENA.
Ontinue
Microsoft-native MXDR with 99.5% AI-automated incident resolution and Teams-based collaboration. Data stays in your own Sentinel instance, giving full portability if you leave. Microsoft-only, not suitable for multi-vendor stacks.
OpenText
Sensible fit for smaller IT teams that want OpenText's threat intelligence and a 24/7 SOC layered on top of their current tools, as long as they accept a co-managed model where their team still executes containment.
Optiv
Optiv MDR is strongest when the buyer already has a complex stack and wants MDR as part of SOC modernization on Google Security Operations. The trade-off is commercial opacity: pricing, SLA terms, SOC staffing details and breach-warranty terms are not public, and total cost depends on telemetry volume plus optional services.
Orange Cyberdefense
European regulatory accreditations and geographic SOC coverage that few MDR providers can match. Broad service catalog from a single vendor. Trade-off: no published detection metrics, no MITRE participation, and zero practitioner reviews anywhere online.
Performanta
Performanta fits buyers that want Microsoft-centered MDR with Safe XDR, managed SOC and incident-response support from the same services firm. The main diligence items are custom pricing, whether Performanta manages the controls needed for direct remediation, non-Microsoft telemetry depth and what incident-response work is included.
Pondurance
Affordable, technology-agnostic MDR for US mid-market buyers in regulated industries, with a risk-based detection approach and $2M breach warranty. Trade-off: very small team (~124 employees), almost no independent reviews to validate claims, Glassdoor scores suggest internal challenges, and overnight coverage is on-call rather than follow-the-sun.
Quorum Cyber
The strongest Microsoft-native MDR option with a tiered model spanning SMB to enterprise, backed by CREST accreditation, Gartner recognition, and Microsoft MSSP of the Year. Data stays in your own Azure tenant. Trade-off: Microsoft-only (no third-party EDR/SIEM support), no published detection metrics or response SLAs, and very limited independent reviews.
r-tec IT Security
r-tec MDR fits German buyers that need 24x7 detection, incident-response depth and a path to OT MDR. The trade-offs are custom pricing, tier-dependent service hours and response actions that should be turned into written authority before signing.
Rapid7
Full SIEM data access with managed MDR, analyst pod model for environment familiarity, and Active Response via Velociraptor. Trade-off: requires 80%+ Insight Agent coverage (platform lock-in), 500-asset minimum, and the company is navigating a challenging period with declining revenue guidance and activist investor pressure.
Recon InfoSec
Recon InfoSec is a strong fit for buyers who want managed security operations with broad integrations, direct analyst access, proactive hunting, canaries, SIEM/SOAR and included incident response. The trade-offs are custom pricing, limited public third-party validation, no published contractual SLA table and operational details that need buyer confirmation.
Red Canary
Vendor-agnostic MDR with 9 EDR platform integrations and detection-as-code methodology, the broadest EDR support in the MDR market with strong analyst validation (Forrester Leader, G2 #1 satisfaction). Post-Zscaler acquisition: integrations maintained and product quality intact, but elevated customer churn and declining mindshare (4.2% to 2.9%) suggest some buyers are reconsidering.
Kaseya MDR
Kaseya MDR is strongest for MSPs that want RocketCyber-style managed SOC coverage tied into Kaseya, Datto and PSA workflows. The trade-offs are Kaseya commercial lock-in, custom pricing, limited public SLA data and a current branding transition from RocketCyber to Kaseya MDR that buyers should pin down in writing.
SECUINFRA
Fits German and EU buyers that put data sovereignty first and want a partner that will work inside their own SIEM. Buyers outside DACH or those that need transparent SLAs and warranties will find more options in the larger pure-play field.
Secureworks
Open XDR MDR with broad integration, CTU threat intelligence (now Sophos X-Ops), strong MITRE results, and included unlimited remote IR. Post-Sophos acquisition: Taegis continues with active investment. Main risk is whether Sophos sustains enterprise Taegis investment long-term.
Six Degrees
Six Degrees MDR is strongest for UK organisations that want Microsoft-centred MDR delivered from a UK-onshore CSOC. The trade-offs are custom pricing, tier boundaries between MDA, MDR and MXDR, and limited public detail on exact response actions.
Smarttech247
Technology-agnostic MDR that works with your existing SIEM and EDR, with 100% MDR client retention in FY2024 and Gartner Market Guide recognition two years running. Publicly traded on AIM, giving buyers financial transparency rare among smaller MDR providers. The trade-off: tiny review footprint (13 Gartner reviews, zero on G2 or PeerSpot), opaque pricing, no MITRE validation, no breach warranty, and a ~160-person company competing against firms 10x its size.
SonicWall SonicSentry MDR*
SonicSentry MDR is strongest for MSPs that want SonicWall-led managed security services with CrowdStrike endpoint coverage and optional cloud or network MDR. The trade-offs are limited public SLA detail, no public price list, newer MDR review volume and scope that must be checked module by module.
Sophos
Platform vendor with unusually broad third-party integration support (350+ tools), all-in pricing on MDR Complete with full IR and $1M breach warranty, and #1 G2 MDR ranking for 14 consecutive quarters. Key trade-off: requires Sophos agent for full capabilities, dashboard-only data access (no raw query), and the Secureworks acquisition creates product roadmap uncertainty.
Sygnia
The tightest MDR-to-IR integration available: same platform, same 8-person team, no handoff, no separate retainer. Genuine OT/ICS coverage. Trade-offs: zero public reviews, no published detection metrics, opaque pricing and recent CEO turnover.
TENEX.AI*
TENEX.AI fits buyers that want an AI-native MDR model with human analyst oversight and are already close to Google, Microsoft or AWS security operations tooling. The main diligence gaps are billing terms, SLA terms, response approval defaults and independent customer validation.
Truesec
Largest Nordic SOC with deep IR background (120,000+ hours, vendor-stated). MDR Black tier covers IR costs for breaches on monitored devices. Strong fit for Nordic enterprises wanting local expertise. Limited US presence and zero independent reviews make it hard to evaluate for North American buyers.
UnderDefense
Works on top of your existing stack and keeps data in your infrastructure. Transparent $11/device starting price, 30-day onboarding, detection rules in portable Sigma format. The trade-off is a smaller company with no independent metric validation and almost no community visibility.
WatchGuard*
WatchGuard MDR is strongest for MSPs that already standardize on WatchGuard or want a managed SOC option they can sell across smaller customers. Open MDR broadens the fit by supporting selected third-party tools, but buyers still need to check package scope, license dependencies and the lack of public SLA terms.
Wirespeed*
Wirespeed is most interesting as an automated MDR layer for MSPs, lean security teams and Coalition-aligned insurance buyers. It can triage and act on alerts across existing tools rather than replacing the stack. The trade-offs are custom pricing, limited independent validation, no public SLA, no public breach warranty and an automation-heavy model that needs careful scoping.