An open-source search and analytics engine used for full-text search, log analysis, and real-time application monitoring. Originally forked from Elasticsearch, it's like a super-powered search engine that can find and analyze information across billions of records in milliseconds.
A cybersecurity company uses Amazon OpenSearch Service to ingest and search through 50TB of daily security logs, creating real-time dashboards that alert analysts to suspicious patterns within seconds of an event occurring.