Vendors cite managed security market growth as though it settles the build-versus-buy question. It does not. Rapid market growth tells you that more organizations are buying — which is a fact about demand, capital, and labor scarcity, not evidence that outsourcing is right for your specific environment. What the growth figures do tell you is useful, but it is narrower and less flattering to the sales pitch than it sounds.
The Numbers, and What They Are Evidence Of
Forecasts for the managed security services market cluster around 11–12% compound annual growth. One widely cited projection puts the market at roughly $38 billion in 2025 and $43 billion in 2026, reaching about $77 billion by 2031 at a 12.33% CAGR. Another projects roughly $44 billion in 2026 growing to about $105 billion by 2034 at 11.32%. The forecasts disagree on absolute size — a normal feature of market sizing where analysts draw the category boundary differently — but agree on the shape: sustained double-digit growth, with MDR, SOC-as-a-service, and SIEM-as-a-service as the fastest-moving segments.
Here is the honest reading. That growth is driven substantially by labor scarcity and regulatory pressure, not by managed detection being architecturally superior to in-house detection. Organizations are buying because they cannot hire and retain enough qualified analysts to staff a 24/7 rotation, and because compliance frameworks and cyber insurers increasingly expect continuous monitoring that a business-hours team cannot demonstrate. Those are real constraints, and if they apply to you, they matter more than any philosophical preference. But the causation runs through your ability to staff, not through market momentum.
The corollary matters too: growth in a market means growth in providers of varying quality. A rapidly expanding category attracts entrants, and "SOC-as-a-service" is a label anyone can print. Market growth is therefore an argument for harder vendor diligence, not for assuming the category has matured into reliability.
What an In-House SOC Actually Costs
The costing exercise is where most build-versus-buy analyses go wrong, because internal proposals systematically undercount staffing and tooling maintenance.
Industry cost models in 2026 put a minimum viable in-house SOC at roughly $1.2 million to $3 million per year, with staffing accounting for 65–70% of that. Breaking it down: enterprise-grade SIEM, SOAR, and XDR platform licensing commonly runs $500,000–$1,000,000, while personnel for a 24/7 rotation of eight to ten analysts runs $1,500,000–$2,500,000.
That headcount figure is the number internal proposals most often get wrong, and the arithmetic is unforgiving. Genuine 24/7/365 coverage with no single-person shifts requires roughly four to five full-time equivalents per seat once you account for nights, weekends, holidays, vacation, sick leave, training, and attrition. A plan proposing "three analysts for round-the-clock monitoring" is proposing single-coverage shifts with no resilience — which is not 24/7 coverage, it is 24/7 aspiration with a person who eventually quits.
Two further costs get omitted almost universally. Detection engineering is ongoing work, not a deployment phase — someone has to write, tune, and retire detection content continuously, or your expensive platform devolves into a noisy alert firehose the team learns to ignore. And analyst turnover in security operations is high; every departure costs recruitment, ramp time, and institutional knowledge about your environment.
The managed comparison
On the buy side, a 200-user organization might invest roughly $15,000–$25,000 per month for a fully managed MSSP engagement — about $180,000–$300,000 annually. For most mid-market organizations in the 200–2,000 employee range, a managed provider delivers equivalent or better coverage at roughly 25–40% of the cost of a fully staffed in-house SOC.
Treat that ratio as directionally sound and situationally variable. It holds because the provider amortizes the 24/7 rotation and the platform licensing across many clients — an efficiency you cannot replicate internally at mid-market scale. It weakens as you get larger, as your environment gets more unusual, and as the proportion of your alert volume requiring deep application-specific context rises.
The Decision Framework That Actually Discriminates
Cost ratios do not decide this. Four factors do.
1. Can you hire and retain the rotation?
Not "can you afford the salaries" — can you actually recruit eight to ten qualified analysts in your labor market and keep them? For most organizations outside a few metro areas, the honest answer is no, and that single fact resolves the decision regardless of what the spreadsheet says. A partially staffed in-house SOC is worse than a competent managed service, because it produces the appearance of coverage without the substance.
2. How unusual is your environment?
Managed detection works best on recognizable technology. If your estate is mainstream identity, endpoint, cloud, and SaaS, a provider's detection content largely applies to you on day one. If your risk concentrates in custom applications, industrial control systems, or proprietary platforms, generic detection content will not cover it, and you will either pay for extensive custom engineering or accept a blind spot where your actual risk lives. Manufacturing and healthcare organizations with significant OT exposure frequently discover this after signing.
3. Who does the responding?
This is the most consequential and least examined question. Many "managed SOC" engagements deliver alerting and triage, then hand off to you for containment. If nobody on your side can isolate a host at 3 a.m., a service that wakes you up to tell you about it has not solved your problem. Establish precisely which actions the provider is authorized and committed to take unilaterally — host isolation, account disable, blocking — and which come back to you. A hybrid model where the provider monitors and a small internal team responds is a legitimate and common design, but it requires an internal team that exists.
4. What does compliance actually require?
Some frameworks and insurers require continuous monitoring, documented log retention, and demonstrable response timelines. A provider who supplies that evidence as a routine artifact may be worth more than the coverage itself, because assembling it internally is real ongoing work. Conversely, if your obligations are lighter than you assumed, some of the platform spend in an internal proposal may be solving for a requirement you do not have.
Questions That Separate Real Providers From Repackaged Alerting
In a market growing at 12% a year with entrants of uneven quality, these are the questions that surface the difference:
"What is your mean time to notify, contractually?" Not marketed, contractual, with a remedy attached. Vague "rapid response" language means no commitment.
"Show me a recent after-hours escalation." Redacted is fine. A provider who cannot produce an example of waking someone up on a Sunday may be running a business-hours operation with a 24/7 marketing page.
"Who tunes detections for our environment, and how often?" If the answer is that their content is universal and needs no tuning, you will be drowning in false positives within a quarter and your team will stop reading the alerts.
"What happens to our log data if we leave?" Retention, export format, and portability. Data locked in a proprietary platform is a switching cost that grows every month, and it is the mechanism by which a mediocre provider becomes permanent.
"Which actions will you take without asking us?" The containment authority question from above, in writing.
Our comparison of SIEM vs XDR vs MDR covers what each service category actually commits to, and the MSSP market overview gives the broader provider landscape.
Where Each Model Genuinely Wins
Buy if you are under roughly 2,000 employees with a mainstream technology estate, cannot credibly staff a 24/7 rotation in your labor market, and need compliance evidence as a byproduct. This describes most mid-market organizations, which is precisely why the market is growing at double digits.
Build if your risk concentrates in custom or operational technology that generic detection content will not cover, if you have regulatory or contractual constraints on third-party access to your telemetry, or if you are large enough that the per-analyst economics invert — which typically means well north of the mid-market band.
Hybrid — provider handles 24/7 monitoring and triage, a small internal team owns response, threat hunting, and detection engineering for your bespoke systems — is where a lot of well-run mid-market security organizations actually land. It is more expensive than pure managed and far cheaper than a full internal SOC, and it fails when the internal side is understaffed to the point of being notional.
The practical move: cost your in-house option at four to five FTEs per 24/7 seat rather than the headcount your internal proposal assumed, then ask any prospective provider the containment-authority question and request one redacted after-hours escalation. Those two steps do more to resolve build-versus-buy than any market forecast, because they test the two things that actually determine whether coverage is real — whether you can staff it, and whether someone is contractually obligated to act when it matters.
Frequently Asked Questions
How much does an in-house SOC cost in 2026?
Industry models put a minimum viable in-house SOC at roughly $1.2–$3 million annually, with staffing at 65–70% of the total. Platform licensing for enterprise SIEM, SOAR, and XDR typically runs $500,000–$1,000,000, and a 24/7 rotation of eight to ten analysts runs $1.5–$2.5 million.
How much cheaper is an MSSP than building?
For most mid-market organizations of 200–2,000 employees, a managed provider delivers comparable or better coverage at roughly 25–40% of a fully staffed in-house SOC. A 200-user organization might pay $15,000–$25,000 monthly for a fully managed engagement. The advantage narrows as organizations grow and as environments become less mainstream.
Does managed security market growth mean outsourcing is the right answer?
No. Growth of roughly 11–12% annually reflects labor scarcity and regulatory pressure driving demand — not evidence that managed detection is architecturally superior. It also means more providers of uneven quality entering the category, which argues for harder diligence rather than less.
How many analysts does 24/7 coverage actually require?
Roughly four to five full-time equivalents per seat, once nights, weekends, holidays, leave, training, and attrition are accounted for. A proposal staffing round-the-clock monitoring with three analysts is describing single-coverage shifts with no resilience.
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