While ELK SIEM and Chronicle SOAR are popular tools used in Security Operations Centers (SOCs), there are alternative options available that may better suit specific SOC requirements. Here are a few notable alternatives to consider:

1. Splunk Enterprise Security: Splunk is a widely recognized and powerful SIEM solution. Splunk Enterprise Security provides advanced threat detection, analytics, and visualization capabilities. It offers a comprehensive set of features for log management, event correlation, incident response, and threat intelligence integration.

2. IBM QRadar: QRadar is an enterprise-grade SIEM platform that combines log management, threat detection, and incident response capabilities. It supports real-time analysis, anomaly detection, and offers pre-built use cases for various security scenarios. QRadar also integrates well with other IBM security tools.

3. LogRhythm: LogRhythm offers a SIEM platform with advanced analytics, threat intelligence, and security automation capabilities. It includes features such as real-time monitoring, behavioral analytics, and customizable dashboards. LogRhythm also provides integrated incident response workflows and compliance management.

4. Palo Alto Networks Cortex XSOAR: Cortex XSOAR (formerly known as Demisto) is a comprehensive SOAR platform. It enables SOC teams to automate and orchestrate security processes, including incident response, threat hunting, and playbooks. Cortex XSOAR offers extensive integrations with security tools and provides a rich library of pre-built automation workflows.

5. Rapid7 InsightIDR: InsightIDR is a cloud-based SIEM solution with advanced detection capabilities and user behavior analytics. It combines log data, endpoint telemetry, and user activity information to provide comprehensive threat detection and incident investigation capabilities. InsightIDR also offers automated response actions and integrations with other Rapid7 security solutions.

6. AT&T AlienVault USM: AlienVault USM (Unified Security Management) is a comprehensive SIEM platform that integrates multiple security capabilities, including asset discovery, vulnerability assessment, intrusion detection, and SIEM functionality. It provides a unified view of security events, threat intelligence, and offers pre-built compliance reports.

These are just a few examples of SIEM and SOAR tools that can be considered as alternatives. When selecting tools for a SOC, it's crucial to evaluate factors such as functionality, scalability, ease of use, integration capabilities, and cost-effectiveness. Additionally, it's recommended to thoroughly assess the specific needs and objectives of the SOC to choose the most suitable tools for its unique requirements.