OpenSearch
Open-source search engine with vector and hybrid search.
A Linux Foundation search and analytics engine (forked from Elasticsearch) with k-NN vector search, hybrid lexical-plus-vector ranking and neural search plugins; also offered managed on AWS.
- Vendor
- OpenSearch Software Foundation
- Category
- Vector databases
- Pricing
- Open source
- Open source
- Yes
- License
- Apache 2.0
- Platforms
- Self-host, Cloud
- Launched
- 2021
- Website
- opensearch.org
Features
- k-NN vector search
- Hybrid search
- Neural search plugins
Best for
- Enterprise
- Research
More vector databases
- pgvector — Open source. Vector similarity search inside Postgres.
- Pinecone — Pinecone. Fully managed serverless vector database.
- Qdrant — Qdrant. High-performance vector search engine in Rust.
- Chroma — Chroma. The open-source embedding database.
- Weaviate — Weaviate. AI-native open-source vector database.
- Milvus — Zilliz. Vector database for billion-scale workloads.
- Elasticsearch — Elastic. Search engine with dense, sparse and hybrid vector retrieval.
- Redis (vector search) — Redis. In-memory vector search, semantic caching and agent memory.