OpenSearch
Open-source search and analytics engine with vector capabilities
OpenSearch is a community-driven fork of Elasticsearch providing full-text and vector search in one platform. It combines traditional search analytics with modern semantic search, fully open-source and community-governed.
| Pricing from | Free (open-source), AWS managed $0.25/hour |
| Best for | Teams already invested in Elasticsearch wanting vector search additions |
| Website | opensearch.org |
Strengths and trade-offs
- Mature, battle-tested platform with large community
- Excellent for hybrid search combining keyword and semantic relevance
- Requires significant infrastructure investment for self-hosting
- Can be complex to optimise for vector-specific use cases
Appears in
Alternatives to OpenSearch
 PineconeManaged vector database for semantic search at scale | #1 in Top 10 AI Search & Retrieval Engines | 95.0 |
 WeaviateOpen-source vector search platform with GraphQL API | #2 in Top 10 AI Search & Retrieval Engines | 92.7 |
 MilvusOpen-source vector database engineered for scalable similarity search | #3 in Top 10 AI Search & Retrieval Engines | 90.3 |
 QdrantVector search engine optimised for extended filtering and production workloads | #5 in Top 10 AI Search & Retrieval Engines | 85.7 |
 Elasticsearch | #6 in Top 10 AI Search & Retrieval Engines | 83.3 |
 ChromaEmbedding database purpose-built for LLM applications | #7 in Top 10 AI Search & Retrieval Engines | 81.0 |
Questions about OpenSearch
How much does OpenSearch cost?
Lister lists OpenSearch's pricing as: Free (open-source), AWS managed $0.25/hour.
Is OpenSearch free?
Yes. Its pricing reads: Free (open-source), AWS managed $0.25/hour.
Who is OpenSearch best for?
OpenSearch is best for teams already invested in Elasticsearch wanting vector search additions.
Where does OpenSearch rank?
OpenSearch is ranked #4 in Top 10 AI Search & Retrieval Engines (Lister Score 88.0).
What are the best alternatives to OpenSearch?
The closest alternatives on Lister are Pinecone (#1 in Top 10 AI Search & Retrieval Engines), Weaviate (#2 in Top 10 AI Search & Retrieval Engines) and Milvus (#3 in Top 10 AI Search & Retrieval Engines).
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