Elastic SIEM, now part of the broader Elastic Security solution, offers a free and open-source application designed to enhance the capabilities of security teams by providing visibility, threat hunting, automated detection, and SOC workflows. Built on the Elastic (ELK) Stack, it leverages the speed and scalability of Elasticsearch, integrating tools like Elastic Maps and Kibana to facilitate situational awareness and threat detection. The application includes detection rules aligned with the MITRE ATT&CK framework and offers unique features such as a timeline investigator and investigation templates to reduce mean time to detect and respond to threats. Elastic SIEM's open approach extends beyond code, fostering a community-driven environment with an open roadmap and data model, enabling organizations to deploy and scale their security operations without the financial constraints of traditional SIEM licensing models. Elastic also provides commercial extensions to further enhance capabilities, including machine learning-based anomaly detection and integration with external systems, all while maintaining transparency and community engagement through forums and public issue tracking.