Nearest Neighbor Search Python Packages

lancedb

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

pynndescent

A Python nearest neighbor descent for approximate nearest neighbors

annoy

Approximate Nearest Neighbors in C++/Python optimized for memory usage and loading/saving to disk

usearch

Fast Open-Source Search & Clustering engine × for Vectors & Arbitrary Objects × in C++, C, Python, JavaScript, Rust, Java, Objective-C, Swift, C#, GoLang, and Wolfram 🔍

docarray

Represent, send, store and search multimodal data

voyager

🛰️ An approximate nearest-neighbor search library for Python and Java with a focus on ease of use, simplicity, and deployability.

rabitqlib

An official lightweight library for the RaBitQ algorithm and its applications in vector search.

infino

Embedded retrieval library built on Parquet. Fast, efficient, and scalable.

torchpq

Approximate nearest neighbor search with product quantization on GPU in pytorch and cuda

elastiknn-client

Elasticsearch plugin for nearest neighbor search. Store vectors and run similarity search using exact and approximate algorithms.

mlpack

mlpack: a fast, header-only C++ machine learning library

lynsedb

Embedded-first vector database that grows into a self-hosted service and lightweight cluster.

creating-intelligence

A computational foundation for AGI, based on hyperdimensional computing and framed in set theory.

annoy-mm

Approximate Nearest Neighbors in C++/Python optimized for memory usage and loading/saving to disk

meshsearch

Uniform cubic mesh for fast neighbour queries in 3D, in C++ with Python bindings

scann-core

ScaNN vector similarity search as a standalone library: fast approximate nearest-neighbor search for C++, Python and Rust, no TensorFlow needed. AVX2/AVX-512 and Arm Neon/SVE kernels, free-threaded Python, optional PyTorch and TensorFlow integration. Not an official Google product.

ngt

Nearest Neighbor Search with Neighborhood Graph and Tree for High-dimensional Data

tiledb-vector-search

Cloud-native vector similarity search and storage with efficient, serverless scale-out

usearch-iscc

Fast Open-Source Search & Clustering engine × for Vectors & Arbitrary Objects × in C++, C, Python, JavaScript, Rust, Java, Objective-C, Swift, C#, GoLang, and Wolfram 🔍

tfsim-nightly

TensorFlow Similarity is a python package focused on making similarity learning quick and easy.

liteindex

ultra fast, thread and process safe, easily queryable Indexes/ caches for Python.

aster-vec

Embedded on-device vector database for AI agent memory and local RAG — disk-based HNSW in an LSM-tree, C++/Python, optimized for low memory footprint

tensorflow-similarity

TensorFlow Similarity is a python package focused on making similarity learning quick and easy.

lancedb-compat

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