# Elasticsearch

> Elasticsearch provides vector search via kNN plugin with HNSW/IVF, hybrid lexical+vector (BM25+ANN), and Lucene-based dense retrieval. Ideal for enterprise search with aggregations and security. Outperforms Vespa in ecosystem integrations but heavier than lightweight DBs like Qdrant.

- **URL:** https://www.elastic.co/elasticsearch/
- **Category:** Search Engine Vector Extensions
- **Tags:** Lucene Knn, Hybrid Lexical Vector, Enterprise Search
- **Updated:** 2026-04-29 11:31
- **Canonical page:** https://vectordb.ever.works/items/elasticsearch

## Details

## Overview

Elasticsearch integrates vector search with keyword search capabilities.

## Best For

- Legacy enterprise search migrations
- Keyword-heavy RAG

## Key Edge

- Hybrid ranking
- Mature security features
- Enterprise-grade observability.

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