Understanding SIEM costs in 2026: key factors and pricing models for enterprises

Security Information and Event Management (SIEM) is security software that collects and analyzes log and event data from across an organization’s IT systems to detect threats, support compliance, and speed up incident response. Since Gartner introduced SIEM in 2005, the technology has become a core part of enterprise security operations. Today, SIEM cost is a board-level concern as organizations balance expanding threats against limited budgets.