SIEM as a Service For London’s Businesses

Outsourcing your SIEM to an MSSP gives you access to specialists who know how to deploy, maintain, monitor and troubleshoot the platform properly – something that can be hard to resource in-house. SIEM tools need constant tuning, patching and rule updates, and when something goes wrong, you want people who deal with these systems every day.

Like most managed services, you get the benefit of a broad, experienced security team for a fraction of the cost of hiring the same expertise yourself, and you free your internal IT staff from the time-consuming work of managing a security platform.

The TCO difference mainly comes down to staffing and maintenance. Running SIEM in-house gives you full control and the ability to customise everything, but it requires significant upfront investment in hardware and software, plus a dedicated team to manage it 24/7. It’s also harder to scale as the business grows.

On the other hand, Managed SIEM removes those hidden operational costs – the provider handles monitoring, tuning and updates and improvements. You still get the reporting and visibility you need, and access to a 24/7 SOC for escalation and remediation, but without carrying the full burden of running the system yourself.

SIEM as a Service actually makes meeting compliance requirements easier. Because all your log data is centralised, monitored automatically and retained for the correct time periods, it supports the evidence and reporting you need for frameworks like GDPR and ISO 27001. Real-time alerting helps you spot policy violations quickly, and detailed reports can be generated for audits or industry-specific checks.

If anything, SIEM as a Service strengthens your ability to demonstrate good security practices and respond to issues promptly.

A typical SIEM implementation starts by enabling advanced auditing on your endpoints, so Windows generates far richer event logs before sending them into the SIEM. From there, we integrate the core log sources most businesses need: Microsoft 365, firewalls, and tools like Keeper, Duo and Defender.

After that, it’s driven by your environment – if your IT team has specialist systems they want monitored, we can add them as additional log sources.

Our platform already includes SOC investigation and response, with automated containment to stop threats spreading. There is some early SOAR capability, but it’s currently focused on manual escalation rather than fully automated actions like disabling accounts or isolating machines. For now, when something needs deeper investigation, it is sent straight to our SOC team instead of letting the system act autonomously. Further automation is coming, but the key safeguards – monitoring, alerting and containment – are already in place.

When assessing a SIEM as a Service provider, it’s worth digging into how they actually run and maintain the platform, rather than just what technology they use. Ask about their lifecycle management (how they keep tools up to date), their SLAs for monitoring and response and how they tune and refine alerts over time.

It’s also useful to understand how they approach security more broadly – for example, how they train their staff, how they handle incidents and how their SIEM service supports compliance. The goal is to assess the provider’s mindset and processes, not just the product.