Information Retrieval Python Packages

rank-bm25

A Collection of BM25 Algorithms in Python

simsimd

SIMD-accelerated distances, dot products, matrix ops, geospatial & geometric kernels for 16 numeric types — from 6-bit floats to 64-bit complex — across x86, Arm, RISC-V, and WASM, with bindings for Python, Rust, C, C++, Swift, JS, and Go 📐

gensim

Topic Modelling for Humans

unstructured

Convert documents to structured data effortlessly. Unstructured is open-source ETL solution for transforming complex documents into clean, structured formats for language models. Visit our website to learn more about our enterprise grade Platform product for production grade workflows, partitioning, enrichments, chunking and embedding.

stringzilla

Up to 100x faster strings for C, C++, CUDA, Python, Rust, Swift, JS, & Go, leveraging NEON, AVX2, AVX-512, SVE, GPGPU, & SWAR to accelerate search, hashing, sorting, edit distances, sketches, and memory ops 🦖

easyocr

Ready-to-use OCR with 80+ supported languages and all popular writing scripts including Latin, Chinese, Arabic, Devanagari, Cyrillic and etc.

bm25s

Fast BM25 search in Python, powered by Numpy and Numba

mteb

MTEB: State-of-the-art evaluation of embeddings across languages and modalities

haystack-ai

Open-source AI orchestration framework for building context-engineered, production-ready LLM applications. Design modular pipelines and agent workflows with explicit control over retrieval, routing, memory, and generation. Built for scalable agents, RAG, multimodal applications, semantic search, and conversational systems.

flagembedding

Retrieval and Retrieval-augmented LLMs

numkong

SIMD-accelerated distances, dot products, matrix ops, geospatial & geometric kernels for 16 numeric types — from 6-bit floats to 64-bit complex — across x86, Arm, RISC-V, and WASM, with bindings for Python, Rust, C, C++, Swift, JS, and Go 📐

onyx-devtools

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

onyx-devtools-audit

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

libraft-cu12

RAFT contains fundamental widely-used algorithms and primitives for machine learning and information retrieval. The algorithms are CUDA-accelerated and form building blocks for more easily writing high performance applications.

pylibraft-cu12

RAFT contains fundamental widely-used algorithms and primitives for machine learning and information retrieval. The algorithms are CUDA-accelerated and form building blocks for more easily writing high performance applications.

pageindex

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

ranx

⚡️A Blazing-Fast Python Library for Ranking Evaluation, Comparison, and Fusion 🐍

colpali-engine

The code used to train and run inference with the ColVision models, e.g. ColPali, ColQwen2, and ColSmol.

pyserini

Pyserini is a Python toolkit for reproducible information retrieval research with sparse and dense representations.

pytrec-eval

pytrec_eval is an Information Retrieval evaluation tool for Python, based on the popular trec_eval.

beir

A Heterogeneous Benchmark for Information Retrieval. Easy to use, evaluate your models across 15+ diverse IR datasets.

pyplexity

Cleaning tool for web scraped text

libcuvs-cu12

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

instructorembedding

[ACL 2023] One Embedder, Any Task: Instruction-Finetuned Text Embeddings