SOC vs MDR: Which Is Right for Your Organisation?
The build-vs-buy decision in security operations is one of the most consequential a CISO makes. In-house SOC, Managed Detection and Response, and co-managed hybrid models each have distinct cost, capability, and control profiles. This guide gives you the framework to make the right choice for your organisation in 2026.
The Three Security Operations Models
In-House SOC
The organisation builds, staffs, and operates its own Security Operations Center. Internal analysts monitor, triage, and respond. The organisation owns all tooling, detection logic, and institutional knowledge. Maximum control, maximum investment.
Managed Detection and Response
A specialist third-party provider monitors the environment, detects threats, and escalates (or in some contracts, responds) on the organisation's behalf. The provider owns analysts, tooling, and detection content. Fastest to operationalise, lowest capital investment.
Co-Managed SOC (Hybrid)
An MDR or MSSP extends the internal security team — covering 24×7 monitoring and initial triage while the internal team retains ownership of complex investigations, incident command, and strategic detection engineering. Best of both worlds when executed well.
Head-to-Head Comparison: 12 Key Criteria
Based on industry benchmarks, vendor data, and real-world deployment experience. Cost figures are indicative for a 500-endpoint organisation in 2026.
| Criteria | In-House SOC | MDR | Co-Managed | Edge |
|---|---|---|---|---|
| Annual Cost (500-endpoint org) | $1.8M–$3.2M (staff + tools + infra) | $180K–$420K (service fee) | $600K–$1.4M (reduced staff + MDR fee) | MDR / Co-managed |
| 24×7 Coverage | Possible but requires 5–6 FTE + on-call | Included in service SLA | MDR covers overnight, internal covers day | MDR / Co-managed |
| Time-to-Respond (SLA) | Internally defined; highly variable | Contractual SLA: typically 15–60 min escalation | MDR SLA + internal ownership of complex IR | MDR (contractual accountability) |
| Analyst Expertise Level | Dependent on hiring and retention success | Access to 50–200 senior analysts across clients | Internal expertise + MDR specialisation | MDR (breadth of cross-client expertise) |
| Organisational Context | Deep — analysts know your environment | Shallow — generic playbooks, limited context | Hybrid — internal team provides context | In-house SOC / Co-managed |
| Detection Customisation | Full control over detection rules and tuning | Limited — vendor manages detection stack | Shared — internal rules + MDR content | In-house SOC |
| Compliance & Audit Evidence | Full control of logs, evidence, reporting | Variable — depends on contract and SLA | Internal control + MDR reporting supplements | In-house SOC / Co-managed |
| Threat Intelligence | Dependent on subscriptions and staff | Cross-client intel from hundreds of environments | MDR intelligence + internal context | MDR (cross-client visibility at scale) |
| Active Response (Containment) | Full autonomous containment capability | Limited — escalation-only in most contracts | Internal team executes, MDR escalates | In-house SOC / Co-managed |
| Time to Operationalise | 12–24 months from scratch | 4–8 weeks for basic onboarding | 6–12 weeks for integration | MDR (speed to coverage) |
| Staff Attrition Risk | High — SOC analyst turnover averages 25–40%/year | Provider manages their staffing risk | Reduced — smaller internal team to retain | MDR / Co-managed |
| Technology Vendor Lock-in | Your choice of stack — full flexibility | Often requires MDR-preferred tooling | Some MDR tooling requirements likely | In-house SOC |
Decision Framework: Which Model Fits Your Situation?
No single model is universally superior. The right answer depends on your organisation's size, regulatory exposure, risk appetite, budget, and existing security team maturity.
Build an In-House SOC
- →Organisation has 2,000+ endpoints or operates critical infrastructure
- →Regulatory requirements mandate internal evidence custody (FISMA, FedRAMP)
- →Board-level mandate for internal security capability and control
- →Sufficient budget: $2M+ annual security operations investment
- →Existing security team of 8+ FTE as a foundation
- →Highly customised or air-gapped environments that MDR cannot instrument
- →Classified or highly sensitive data that cannot leave internal systems
Engage an MDR Provider
- →Organisation has fewer than 1,000 endpoints
- →Security team of 1–3 FTE with no 24×7 coverage today
- →Budget constraint: cannot justify $2M+ annual SOC investment
- →Speed is critical — need coverage within weeks, not months
- →No experienced SOC leadership to build and run an in-house operation
- →Recovery from a significant incident requiring immediate capability uplift
- →Regulatory compliance deadline creating pressure for immediate 24×7 coverage
Co-Managed SOC (Hybrid)
- →Mid-market organisation with 500–5,000 endpoints
- →Existing security team of 3–8 FTE wanting to extend capability
- →Need 24×7 coverage but want to retain IR ownership and institutional knowledge
- →Compliance requirements that necessitate internal oversight of evidence chain
- →Desire to build internal expertise over time while MDR covers gaps today
- →Specific investigative or threat hunting capability MDR cannot provide at depth
Types of MDR Providers in 2026
Not all MDR is the same. The market has segmented into distinct provider archetypes with very different delivery models, technology requirements, and suitability for different organisations.
Technology-Led MDR
CrowdStrike Falcon Complete, SentinelOne Vigilance, Microsoft MXDR
Built on and around the vendor's own EDR/XDR platform. Detection quality is excellent within the vendor's tooling, but coverage of third-party log sources (competing SIEM, network tools, cloud platforms) is often limited. Best for organisations standardised on the vendor's endpoint stack.
Best for: Organisations with standardised endpoint platforms
Platform-Agnostic MDR
Arctic Wolf, Expel, Pondurance, Deepwatch
Technology-agnostic providers that integrate with your existing stack. They ingest from your SIEM, EDR, cloud platform, and other tools rather than requiring you to replace your tooling. Provide more organisational context because they work within your environment rather than alongside it.
Best for: Organisations with heterogeneous environments
Specialist / Niche MDR
Critical infrastructure MDR, healthcare-specific, OT/ICS-focused providers
Vertically specialised MDR providers with deep expertise in specific industries or technology environments (OT/SCADA, healthcare IoMT, financial services). Provide sector-specific threat intelligence and compliance-aware response procedures. Typically at premium cost.
Best for: Critical infrastructure, healthcare, financial services with OT/IoT
MSSP with MDR Capability
Managed security service providers adding MDR functionality
Traditional MSSPs that have evolved from reactive monitoring to proactive MDR. Service quality varies significantly — evaluate on SLA contractuals, escalation procedures, threat hunting frequency, and analyst-to-client ratios. The term "MDR" is applied loosely in this segment.
Best for: Budget-constrained organisations needing broad coverage at lower cost
Making Co-Managed SOC Work: Critical Considerations
Co-managed SOC is the fastest-growing model in mid-market security, but it is also the most complex to execute well. These are the non-negotiable success factors.
Define Responsibility Boundaries
The most critical co-managed SOC challenge is clarity about who owns what. Define explicitly: which alert classes the MDR handles autonomously, which require internal analyst involvement before action, what constitutes an escalation trigger, and who has authority to execute containment. Document this in a Responsibility Assignment Matrix (RACI).
Maintain Internal IR Ownership
In a co-managed model, the MDR handles triage and escalation but the internal team owns incident command, communication to leadership, regulatory notification, and post-incident review. This ownership must be exercised actively — organisations that hand off IR entirely to MDR lose the institutional knowledge needed for continuous improvement.
Knowledge Transfer Mechanisms
Require your MDR provider to share detection logic, investigation methodologies, and threat intelligence as part of the service. Weekly threat briefings, quarterly detection reviews, and access to SOC analyst notes build internal capability over time rather than creating permanent dependence.
Integration Depth Requirements
Co-managed success depends on deep integration: bi-directional alert flow between MDR and your internal ticketing system, shared access to investigation notes, and coordinated response playbooks. "Phone call escalation" is not co-managed SOC — it is MDR with an internal team standing by.
How Your Operating Model Affects SOC Maturity
| Model | Typical Maturity Ceiling | Primary Constraint |
|---|---|---|
| MDR Only (no internal team) | Level I | MDR owns detection; organisation lacks internal capability to advance |
| MDR + Small Internal Team | Level I–II | Internal team builds on MDR foundation; threat hunting limited |
| Co-Managed SOC (well-executed) | Level II–III | Advanced capabilities require internal expertise MDR supplements |
| In-House SOC (fully staffed) | Level III | Depends on investment in tooling, staffing, and programme maturity |
| In-House SOC + AI Augmentation | Level III–IV | AI tooling maturity and analyst training for AI-augmented workflows |
Frequently Asked Questions
- Does using MDR count toward our SOC maturity score?
- Yes, with caveats. MDR coverage satisfies the 24×7 monitoring requirement at Level I and contributes to threat intelligence, detection coverage, and incident response capabilities. However, your maturity score reflects your organisation's demonstrable capabilities — MDR-sourced capabilities only count where your team actively participates, understands the procedures, and can operate independently if the MDR contract ends.
- What questions should we ask an MDR vendor before signing?
- Critical questions: (1) What is the analyst-to-client ratio? (2) Are analysts dedicated or shared across hundreds of clients? (3) What is the contractual MTTD and escalation SLA, and what are the remedies for breach? (4) Do you share detection rules and investigation methodologies with clients? (5) How do you handle log sources outside your native platform? (6) What does "response" mean — containment actions, or just notification? (7) Can you show reference clients in our sector with equivalent environments?
- How does MDR compare for compliance requirements like NIS2 or DORA?
- MDR can satisfy the technical detection and monitoring requirements of NIS2 and DORA, but the governance and accountability requirements are retained by the organisation. Incident notification timelines (NIS2 72-hour rule, DORA early warning requirements) are your organisational obligation regardless of MDR use. Ensure your MDR contract specifies escalation timelines that leave you sufficient time to prepare regulatory notifications.
- What is the typical MDR analyst-to-client ratio, and why does it matter?
- Industry ratios range from 1:8 (boutique MDR) to 1:50+ (high-volume MSSP-style MDR). The ratio matters because it determines how much dedicated attention your environment receives and how quickly analysts develop environmental context. At very high ratios, "MDR" becomes near-automated alerting with minimal human investigation. Ask specifically about how many clients each analyst monitors during a shift.
- Can we transition from MDR back to in-house SOC later?
- Yes, and many organisations do this as they grow. Plan for the transition from day one by maintaining internal ownership of your SIEM and log management, ensuring MDR detection content is documented and transferable, and building internal analyst skills during the MDR engagement rather than fully deferring to the provider. The organisations that struggle with MDR-to-in-house transitions are those that allowed the MDR to become the sole owner of detection logic and tooling.
Understand your current SOC maturity before deciding
The RateMySOC assessment helps you understand your current capability gaps — which directly informs whether MDR, an in-house build, or a co-managed approach is right for your organisation. Free, anonymous, 15 minutes.
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