Easy to use open source fast database for search | Good alternative to Elasticsearch now | Drop-in replacement for E in the ELK soon

Postgres for Search and Analytics

The AI-native database built for LLM applications, providing incredibly fast hybrid search of dense vector, sparse vector, tensor (multi-vector), and full-text

AdalFlow: The library to build & auto-optimize LLM applications.

Developer friendly Natural Language Processing ✨

A Collection of BM25 Algorithms in Python

Fast lexical search implementing BM25 in Python using Numpy, Numba and Scipy

Similarities: a toolkit for similarity calculation and semantic search. 相似度计算、匹配搜索工具包，支持亿级数据文搜文、文搜图、图搜图，python3开发，开箱即用。

Neural Search

对四种句子/文本相似度计算方法进行实验与比较

A Python implementation of the BM25 ranking function.

A Python Search Engine for Humans 🥸

IResearch is a cross-platform, high-performance search analytics library written entirely in C++ with the focus on a pluggability of different ranking/similarity models

SeekStorm - sub-millisecond full-text search library & multi-tenancy server in Rust

Easy-to-Use RAG Framework; CCF AIOps International Challenge 2024 Top3 Solution; CCF AIOps 国际挑战赛 2024 季军方案

Emacs package that helps org-mode users (re)discover similar documents

Document Search Engine Tool

Fast Full Text Search based on BM25

The fast python bm25 algorithm implemented with reverted index

Code for the ACL 2023 long paper - Expand, Rerank, and Retrieve: Query Reranking for Open-Domain Question Answering