Graylog Security

What it does

Graylog Security is a security information and event management (SIEM) platform built on the open-core Graylog log management stack and designed for lean security teams. It pairs behavioral detectors, including impossible travel detection and log volume anomaly detection, with asset-based risk scoring so alerts are prioritized by actual organizational risk rather than raw volume. A built-in security data lake stores years of logs without counting against license consumption, removing the visibility versus cost tradeoff of traditional SIEMs.

How it works

The platform ingests logs via Syslog, CEF, GELF, Beats, IPFIX, and NetFlow, then normalizes and enriches them with Illuminate content packs that supply parsers, dashboards, and Sigma detection rules aligned to the MITRE ATT&CK framework. A correlation engine and machine learning user and entity behavior analytics (UEBA) anomaly detection surface threats that fixed rules miss, while vulnerability scan ingestion feeds asset and event risk scores. Risk threshold breaches auto-create investigations with consolidated event procedures, and AI summaries produce audit-ready reports at case closure. A built-in Model Context Protocol (MCP) server supports natural language investigation using a customer-supplied large language model.

Credentials and traction

Graylog was named in the 2025 Gartner Magic Quadrant for Security Information and Event Management (SIEM) and positioned as a Leader and Outperformer in GigaOm's 2025 Radar Report for SIEM. The Graylog Cloud environment is SOC 2 Type II certified. The platform serves more than 60,000 organizations worldwide, with 200,000+ IT and security professionals using Graylog every day, and targets lean security teams, MSSPs, and regulated industries including healthcare, banking, and the public sector.