Is SIEM the same thing as a SOC?

No. SIEM is a software platform that collects, correlates, and analyses security logs. A SOC (Security Operations Centre) is a team of analysts who use SIEM and other tools to monitor, detect, and respond to threats. SIEM without a SOC generates alerts that nobody investigates. A SOC without SIEM lacks the data correlation needed to identify sophisticated attacks effectively.

Can a SIEM tool replace the need for a SOC team?

No. SIEM is a powerful data platform but it requires skilled analysts to write detection rules, investigate alerts, and take response actions. Without a SOC team operating it, SIEM becomes an expensive log storage system. With 43% of UK businesses experiencing a breach or attack (DSIT 2025), unactioned SIEM alerts provide a false sense of security that can be worse than having no tool at all.

How much does building an in-house SOC cost compared to buying SIEM software?

SIEM software costs £5,000 to £50,000 per year for the platform alone. Building a minimal SOC with three analysts on rotating shifts costs an additional £150,000 or more annually in salaries. A managed SOC service bundles both the technology and the analysts from around £5,000 per year for smaller organisations, making it the viable option for most UK SMEs.

Should an SME invest in a managed SOC rather than standalone SIEM?

For SMEs without existing security analysts, a managed SOC is almost always the better investment. It provides the SIEM technology, 24/7 human monitoring, and incident response as a complete service. The average cost of the most disruptive breach is £3,550 (DSIT 2025), and a managed SOC's continuous monitoring ensures threats are detected and contained before they escalate to that level.

Comparison

SIEM vs SOC: What's the Difference?

A practical comparison for UK businesses — covering features, costs, and which option suits different requirements.

Key Facts

85%of breaches involved phishing as the attack vector (DSIT 2025)

19,000UK businesses hit by ransomware in the past 12 months

82.6%of phishing emails now use AI-generated content (KnowBe4)

£8,260average breach cost for businesses with negative outcomes

Last updated: March 2026

SIEM vs SOC

Feature	SIEM	SOC
Best For	Depends on requirements	Depends on requirements
UK Availability	Widely available	Widely available
Typical Cost	Varies	Varies
Complexity	Varies	Varies

When to Choose Each Option

Guidance based on your business requirements.

Choose SIEM When

Your business has specific requirements that favour this approach. Budget and resources align with this solution. Your existing infrastructure supports it

Choose SOC When

Your business needs a different approach. You have different budget considerations. Your team has relevant experience

Cost Considerations

Both SIEM and SOC have different cost profiles. The right choice depends on your business size, existing infrastructure, and specific requirements. AMVIA can help you evaluate which option delivers the best value for your situation.

The AMVIA Recommendation

For most UK SMEs, choose a managed SOC service over standalone SIEM. A managed SOC includes SIEM technology, threat intelligence, and 24/7 analyst coverage — delivering the outcomes that SIEM alone promises but rarely achieves without dedicated staff to operate it. AMVIA's managed SOC service provides full coverage from £5,000 per year for organisations under 50 users.

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