elastic / elasticsearch

Free and open source distributed RESTful search and analytics engine built on Apache Lucene.

doocs / advanced-java

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apache / lucene

Apache Lucene open-source search software

ArcadeData / arcadedb

ArcadeDB Multi-Model Database, one DBMS that supports SQL, Cypher, Gremlin, HTTP/JSON, MongoDB and Redis. ArcadeDB is a conceptual fork of OrientDB, the first Multi-Model DBMS. ArcadeDB supports Vector Embeddings.

opensearch-project / OpenSearch

🔎 Open source distributed and RESTful search engine.

MarginaliaSearch / MarginaliaSearch

Internet search engine for text-oriented websites. Indexing the small, old and weird web.

apache / solr

Apache Solr open-source search software

vespa-engine / vespa

The AI search platform

yacy / yacy_search_server

Distributed Peer-to-Peer Web Search Engine and Intranet Search Appliance

datastax / jvector

JVector: the most advanced embedded vector search engine

infinispan / infinispan

Infinispan is an open source data grid platform and highly scalable NoSQL cloud data store.

codelibs / fess

Open-source, self-hosted enterprise & site search server built on OpenSearch. Crawls web / file / DB / cloud sources, 20+ languages, REST API, and AI/RAG & semantic search. Apache-2.0.

Erudika / para

Multitenant backend server for building web and mobile apps rapidly. The backend for busy developers. (self-hosted or hosted)

ronitgupta138 / Vectra-Core

⚡ In-Memory Vector Search Engine & HNSW ANN Graph in Java 21 Loom. Sub-millisecond KNN retrieval, 8-bit scalar quantization (SQ8), 16,000+ QPS.