SOCaaS vs MSSP: Cost, Coverage, and How to Choose

SOCaaS (SOC-as-a-Service) sells the security operations center function as a packaged, tier-based subscription: monitoring, detection, triage and response are bundled with a vendor-provided SIEM and priced from a fixed catalog. An MSSP (Managed Security Service Provider) is a broader, contract-led engagement where scope, SIEM model, response authority and reporting are negotiated per customer and can extend well beyond the SOC to firewall management, vulnerability management and device administration. Put simply: SOCaaS is the catalog-pricing model for the SOC function; MSSP is the contract-pricing model for a wider security infrastructure remit.

For a standard SOC scope, SOCaaS usually has the lower entry point. SOCaaS tier bands run $12K-$120K/year (SMB $12K-$30K, mid-market $30K-$80K, upper-mid/enterprise $80K-$120K+), while traditional MSSP engagements in the mid-market-to-enterprise segment typically run $80K-$300K/year because the scope is broader and the contract is bespoke. The comparison is only fair at equal scope: an MSSP contract that also manages firewalls, endpoints and vulnerability scanning is doing more than a SOCaaS subscription, so a lower SOCaaS price does not always mean a lower total cost for the same coverage.

SOCaaS almost always includes a vendor-provided SIEM in the subscription, so you do not need to own or license Splunk, Microsoft Sentinel or QRadar separately. Traditional MSSPs more often expect you to bring your own SIEM (co-managed model) or will bill the SIEM platform as a separate line item. If you have already invested in a SIEM you want to preserve, an MSSP or co-managed arrangement usually fits better; if you have no SIEM and want one bundled, SOCaaS removes that separate purchase.

SOCaaS is generally faster because it is a standardized catalog service: typical onboarding is 30-60 days. Traditional MSSP engagements involve scope negotiation, integration into your existing tooling and custom runbooks, so onboarding commonly runs 60-120 days. If speed to coverage is a priority (for example, closing an audit gap or replacing a departing internal analyst), SOCaaS onboarding is usually the quicker route.

Choose a traditional MSSP when you are over roughly 1,000 employees and need bespoke scope, when you own a SIEM (Splunk, Sentinel, QRadar) that must be preserved, when you face an exotic compliance regime (FedRAMP, IL5, CMMC Level 3) requiring custom reporting, when you need custom integration into proprietary internal systems, or when you need broad security infrastructure management (firewalls, network, device administration) beyond the SOC function itself. SOCaaS suits the under-1,000-employee segment with standard coverage requirements and standard compliance regimes (PCI, SOC 2) that templated reporting already covers.