Vector Database Python Packages

qdrant-client

Python client for Qdrant vector search engine

llama-index-core

LlamaIndex is the leading document agent and OCR platform

llama-index

LlamaIndex is the leading document agent and OCR platform

lancedb

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

llama-index-instrumentation

LlamaIndex is the leading document agent and OCR platform

pymilvus

Python SDK for Milvus Vector Database

redisvl

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

llama-index-legacy

LlamaIndex is the leading document agent and OCR platform

flashrank

Lite & Super-fast re-ranking for your search & retrieval pipelines. Supports SoTA Listwise and Pairwise reranking based on LLMs and cross-encoders and more. Created by Prithivi Da, open for PRs & Collaborations.

langchain-milvus

The LangChain wrapper of Milvus vector database for efficient vector search, full-text search, hybrid retrieval and RAG.

honcho-ai

Memory library for building stateful agents

nano-vectordb

A simple, easy-to-hack Vector Database

deeplake

Deeplake is AI Data Runtime for Agents. It provides serverless postgres with a multimodal datalake, enabling scalable retrieval and training.

vicinity

Lightweight Nearest Neighbors with Flexible Backends

pyobvector

A Python SDK for OceanBase Multimodal Store—enabling vector search, full-text search, and JSON table operations—offers both Milvus-compatible API and SQLAlchemy-based SQL mode, and supports both OceanBase and OceanBase seekdb.

cognee

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.

pageindex

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

fast-plaid

High-Performance Engine for Multi-Vector Search

topk-sdk

High-quality search for AI-native applications.

txtai

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

zvec

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

sekejap

A graph-first, embedded multi-model database engine

yantrikdb

Cognitive memory engine for AI agents — temporal decay, contradiction detection, autonomous consolidation, knowledge graph, ANN recall via HNSW. Embeddable Rust library with Python bindings; powers yantrikdb-server (HTTP gateway, MCP server, openraft cluster). AGPL.

gpt-index

LlamaIndex is the leading document agent and OCR platform