#vector-database

LlamaIndex is the document processing platform for AI

A query and indexing engine for Redis, providing secondary indexing, full-text search, vector similarity search and aggregations.

Developer-friendly OSS embedded retrieval library for multimodal AI. Search More; Manage Less.

Milvus is a high-performance, cloud-native vector database built for scalable vector ANN search

Cognee is the open-source AI memory platform for agents. Give your AI agents persistent long-term memory across sessions with a self-hosted knowledge graph engine.

Weaviate is an open-source vector database that stores both objects and vectors, allowing for the combination of vector search with structured filtering with the fault tolerance and scalability of a cloud-native database​.

LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.

Redis Vector Library (RedisVL) -- the AI-native Python client for Redis.

Open-source framework for building agentic apps in JavaScript, Go, Dart, and Python, built and used in production by Google

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

A lightning-fast search engine API bringing AI-powered hybrid search to your sites and applications.

Python SDK for Milvus Vector Database

One Postgres for your application data, full-text search, vector retrieval, and aggregations. Home of the pg_search extension.

The AI search platform

A lightweight, lightning-fast, in-process vector database

The unified multimodal backend for AI data apps. Database, orchestration, and serving in one Python file.

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.

Open-source persistent memory for AI agent pipelines (LangGraph, CrewAI, AutoGen) and Claude. REST API + knowledge graph + autonomous consolidation.

The AI-native database built for LLM applications, providing incredibly fast hybrid search of dense vector, sparse vector, tensor (multi-vector), and full-text.

Python client for Qdrant vector search engine

Vector search engine inside Milvus, integrating FAISS, HNSW, DiskANN.

💡 All-in-one AI framework for semantic search, LLM orchestration and language model workflows