Best Open Source Alternatives to ElasticSearch

Logstash is an open-source data processing pipeline that ingests, parses, and enriches logs at scale, serving as an on-premise alternative to Splunk.

vs ElasticSearch: a free, open-source option you fully control.

Open-source in-memory search engine and vector database for JavaScript and TypeScript. Fast full-text, vector, and hybrid search in browser and edge.

vs ElasticSearch: a free, open-source option you fully control.

HelixDB is an open-source graph-vector database in Rust that unifies vector search and graph traversals to replace fragmented multi-database AI stacks.

vs ElasticSearch: a free, open-source option you fully control, licensed Apache-2.0.

Swirl Search is a self-hosted alternative to ElasticSearch and Coveo that queries internal apps live without copying data into a centralized index.

vs ElasticSearch: a free, open-source option you fully control, licensed Apache-2.0.

Trieve is an open-source search, recommendation, and RAG engine that provides hybrid dense-sparse retrieval and self-hosted VPC data privacy.

vs ElasticSearch: a free, open-source option you fully control, licensed MIT.