Sumo Logic is a cloud-native observability platform that ingests, parses, and analyzes logs, metrics, and traces from cloud infrastructure, applications, and services. It sits between raw logs and visualization—ingesting petabytes of data daily and making it searchable and actionable. Unlike a log aggregator (which just stores logs), Sumo Logic provides pattern detection, anomaly alerting, compliance reporting, and cost optimization for cloud infrastructure. It's commonly used to monitor AWS CloudTrail logs, Kubernetes audit logs, and application logs.