OpenSearch is an open-source, distributed, RESTful search and analytics engine forked from Elasticsearch. Backed by the OpenSearch project under the Apache 2.0 licence, it provides full-text search, log and event analytics, and scalable data visualisation through its companion OpenSearch Dashboards — widely used for search applications, observability and security analytics.

Key Features

• Distributed & scalable — Horizontally scales across clusters to handle large data volumes
• Full-text search — Powerful query DSL for precise, relevance-ranked searching
• RESTful API — All operations via simple HTTP endpoints with JSON responses
• OpenSearch Dashboards — Built-in visualisation, dashboards and alerting
• Analytics engine — Aggregations and vector search for log, metric and semantic analysis
• Security & plugins — TLS, role-based access control and a rich plugin ecosystem

Why Use OpenSearch?

OpenSearch gives you enterprise-grade search and analytics on your own hardware with no licence fees. Being Apache 2.0 and community-governed, it is a safe, vendor-neutral foundation for everything from website search to full observability platforms (where it powers stacks such as Wazuh).

Use Cases

• Enterprise and website full-text search
• Log ingestion and observability dashboards
• Security analytics and SIEM data
• Analytics workloads requiring aggregations and visualisation

Platform

Linux · macOS · Windows · Docker · Kubernetes

Licence

Apache 2.0

Website

opensearch.org