A Security Information and Event Management platform collects logs and events from across your IT — servers, endpoints, network gear, cloud and applications — into one place, then correlates them to detect threats and raise alerts. It also retains those logs for investigation and compliance. In short, it turns a flood of scattered events into a manageable view of what's actually happening in your environment.

EDR focuses on endpoints; SIEM is broader, ingesting logs from your whole estate. XDR correlates across a vendor's own tools (endpoint, network, cloud), while SIEM is more open and log-source agnostic. SOAR adds automated response — playbooks that act on what the SIEM detects. Many organisations run SIEM as the central hub and feed EDR/XDR data into it, with SOAR automating response.

A SIEM needs skilled analysts to tune rules, investigate alerts and respond — ideally around the clock. If you have that capability, self-run gives you control. If you don't, a managed SIEM/SOC service provides a 24×7 team who operate it for you, which is often more effective and better value than trying to staff it yourself. We help you weigh the two honestly against your team and budget.

Most SIEM pricing is driven by data volume — how many gigabytes of logs you ingest per day and how long you retain them — rather than users. That's why costs can escalate quickly if you send everything to the SIEM. The key is scoping which log sources genuinely add detection value, and choosing sensible retention. We help you plan this so the bill matches the benefit.

CERT-In directions set expectations around maintaining security logs and reporting significant incidents promptly — a SIEM's centralised log retention, detection and reporting directly support both. It also helps with DPDP accountability, RBI expectations for regulated entities, and standards like PCI-DSS and ISO 27001, and where logs are stored can matter for data residency. Figures here are illustrative, and this is general guidance, not legal advice — confirm current requirements with the vendor and your advisors.