OpenSearch
Open-source search and analytics suite with full-text, vector, and hybrid search
OpenSearch is a distributed, Apache 2.0-licensed search and analytics suite built on Apache Lucene, forked from Elasticsearch in 2021. It does full-text (BM25) keyword search, k-NN vector search via its vector engine, and hybrid search combining the two, plus a built-in observability and dashboards stack.
It runs self-hosted or on-premises, and is available as managed Amazon OpenSearch Service and other providers. The project is governed by the OpenSearch Software Foundation under the Linux Foundation.
Pricing: Usage-based
OpenSearch Alternatives
Explore 24 products in the Vector databases category. View all OpenSearch alternatives.
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TopK
AI-native search engine combining vector, keyword, and faceted search
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