Document Search - OpenSearch
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Document Search
Unify your documents and empower teams with fast, intelligent search
Organizations often struggle to create cohesive, searchable repositories that span file types, document formats, and both structured and unstructured content. OpenSearch simplifies this by unifying documents from across formats and platforms into one seamless search experience.
With a single interface, users can quickly find what they need, boosting productivity and enabling your organization to scale its document repositories with confidence.
Ingest documents from all sources and formats
Index and search your documents at scale
Evaluate your search results with powerful analytics
Advanced search methods tailored to your data and use case
Vector search
Use AI to convert documents into vector embeddings, powering semantic search that finds results by meaning rather than keywords.
Multimodal search
Extend vector search beyond text to include audio and other data types using models trained in a shared multimodal embedding space.
Hybrid search
Blend the strengths of keyword and vector search by combining their relevance scores to deliver more precise and meaningful document search results.
RAG and agentic search
Retrieve relevant documents to ground LLM responses and enable conversational, multi-turn search with intelligent agents.
Learn more about how OpenSearch helps deliver more relevant document search results
View documentation
OpenSearch provides powerful tools for improving search relevance
Semantic queries that understand meaning
Go beyond simple keyword matches. With vector search and machine learning–based embeddings, OpenSearch retrieves documents based on meaning and context, delivering results that actually match what users intend to find.
Search Results Reranking
Highly tunable, configurable, and extensible
From small internal knowledge bases to petabyte-scale enterprise archives, OpenSearch scales effortlessly. Its open architecture lets you fine-tune ranking, filters, and relevance scoring to fit your organization’s unique needs.
Query Rewriting
Secure, transparent, open source
Led by a community effort, OpenSearch gives you full visibility and control over how your search works and where your data lives. Integrate enterprise-grade security, fine-grained access controls, and encryption—all without vendor lock-in.
OpenSearch Community
Explore further resources
OpenSearch blog post
Measuring and improving search quality metrics
Sep 17, 2025
OpenSearch blog post
Lucene-on-Faiss: Powering OpenSearch’s high-performance, memory-efficient vector search
Sep 15, 2025
OpenSearch blog post
Taking your first steps towards search relevance
Aug 13, 2025
OpenSearch blog post
Similar document search with OpenSearch
Jan 11, 2023
First steps toward search relevance
Start building performant, highly relevant search solutions for your document collections.
Search Relevance
Build high-performance, customizable search solutions for document collections, e-commerce, and applications
Explore how OpenSearch does search
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OpenSearch is a community-driven, Apache 2.0-licensed open source search and analytics suite that makes it easy to ingest, search, visualize, and analyze data.
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© Copyright The Linux Foundation. The OpenSearch Project is a project of The Linux Foundation. For web site terms of use, trademark policy and other policies applicable to The OpenSearch Project please see
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. The OpenSearch Project supports the OpenSearch open source project, which has been established as OpenSearch Project a Series of LF Projects, LLC. For policies applicable to the OpenSearch Project a Series of LF Projects, LLC, please see
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