Best Open Source Vector Databases

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

A no-code RAG server that keeps answers in sync with your documents. Works with 8 vector databases. Built on Pathway.

LlamaIndex is the document processing platform for AI

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

Self-evolving Context Database for AI Agents. Unify Agent Memory, Knowledge RAG and Skills.

📑 PageIndex: Document Index for Vectorless, Reasoning-based RAG

Qdrant - High-performance, massive-scale Vector Database and Vector Search Engine for the next generation of AI. Also available in the cloud https://cloud.qdrant.io/

Open Source AI Platform - AI Chat with advanced features that works with every LLM

Cognee is the open-source AI memory platform for agents. Give your AI agents persistent long-term memory with small models for free

This repository showcases various advanced techniques for Retrieval-Augmented Generation (RAG) systems. Each technique has a detailed notebook tutorial.

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​.