Similarity Search Python Packages

lancedb

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

chonkie

🦛 CHONK docs with Chonkie ✨ — The lightweight ingestion library for fast, efficient and robust RAG pipelines

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 🔍

gptcache

Semantic cache for LLMs. Fully integrated with LangChain and llama_index.

cuvs-cu12

cuVS - a library for vector search and clustering on the GPU

libcuvs-cu12

cuVS - a library for vector search and clustering on the GPU

zvec

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

fastembed-vectorstore

In-memory vector store with FastEmbed integration for Python applications.

lynsedb

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

elastiknn-client

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

setsimilaritysearch

All-pair set similarity search on millions of sets in Python and on a laptop

pynear

A python library for efficient KNN search within metric spaces using multiple distance functions.

fpsim2

Simple package for fast molecular similarity searches

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 🔍

quiver-client

Security-first, memory-frugal vector database in Rust with a retro terminal cockpit.

libcuvs-cu13

cuVS - a library for vector search and clustering on the GPU

vd

A facade over vector databases — one interface, ~15 backends

oasysdb

In-memory vector store with efficient read and write performance for semantic caching and retrieval system. Redis for Semantic Caching.

bertsimilar

Get Similar Words and Embeddings using BERT Models

tensorflow-similarity

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

cppbktree

Python BK-Tree module based on a C++ implementation

tfsim-nightly

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

vectrixdb

Where vectors come alive - A lightweight, visual-first vector database with embedded ML models. No API keys required.

liteindex

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