OpenSearch
opensearch.org
Best for Teams needing combined search and vector retrieval
OpenSearch is an open-source search and analytics suite that includes vector database capabilities through its k-NN plugin, supporting approximate nearest neighbor search alongside traditional full-text and analytics queries. It allows teams to combine keyword, structured, and vector search within a single engine, making it suitable for building semantic search, recommendation, and retrieval-augmented generation applications. OpenSearch can be self-hosted or used via managed services from various cloud providers, and suits engineering teams already using or considering the OpenSearch/Elasticsearch ecosystem for combined search and vector workloads.
- Approximate k-NN vector search
- Hybrid keyword and vector queries
- Self-hosted or managed deployment
Where OpenSearch ranks on Software Index
OpenSearch appears in one ranking on Software Index.
| Rank | Ranking | Link |
|---|---|---|
| 7/9 | Vector DatabasesVector Databases | See entry → |
Alternatives to OpenSearch
Products Software Index ranks in the same categories.
OpenSearch FAQ
- What is OpenSearch?
- OpenSearch is an open-source search and analytics suite that includes vector database capabilities through its k-NN plugin, supporting approximate nearest neighbor search alongside traditional full-text and analytics queries. It allows teams to combine keyword, structured, and vector search within a single engine, making it suitable for building semantic search, recommendation, and retrieval-augmented generation applications. OpenSearch can be self-hosted or used via managed services from various cloud providers, and suits engineering teams already using or considering the OpenSearch/Elasticsearch ecosystem for combined search and vector workloads.
- Where does OpenSearch rank on Software Index?
- OpenSearch is ranked #7 of 9 in Vector Databases.
- Who is OpenSearch for?
- It is aimed at teams needing combined search and vector retrieval. Listed capabilities: Approximate k-NN vector search, Hybrid keyword and vector queries, Self-hosted or managed deployment. Free plan.
- What are the alternatives to OpenSearch?
- Software Index ranks Chroma, Deep Lake, Rockset, Typesense, Elastic Observability in the same categories as OpenSearch.
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