What Is SIEM and Why Does Every Organization Need It?

SIEM (Security Information and Event Management) collects and correlates logs and event data from different systems in one place. Most modern attacks leave traces across several systems, making combined log analysis essential.

What does it solve?

• Monitor distributed log sources in one place
• Correlate events across different systems
• Automatically detect attack patterns and tactics, techniques and procedures (TTPs)
• Maintain audit trails for KVKK and ISO 27001
• Search historical data during forensic investigations

Enterprise SIEM options

Prominent options include Splunk, IBM QRadar, Microsoft Sentinel, Elastic Security and Wazuh. Splunk is known for maturity, while Sentinel offers a convenient starting point through native M365 integration. Wazuh is a useful open-source alternative for budget-constrained projects.

When should you adopt SIEM?

Once an organization exceeds 50 employees and collects logs from Windows, Linux, network equipment, firewalls, cameras and IoT devices, SIEM becomes a practical necessity. Smaller environments may be adequately served by log management tools such as Graylog.