Open-source search database for full-text, vector, and hybrid search with real-time indexing and SQL.
One Postgres for your application data, full-text search, vector retrieval, and aggregations. Home of the pg_search extension.
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.
PostgreSQL extension for BM25 relevance-ranked full-text search. Postgres OSS licensed.
A modular Agentic RAG built with LangGraph — learn Retrieval-Augmented Generation Agents in minutes.
SeekStorm: vector & lexical search - in-process library & multi-tenancy server, in Rust.
Fast BM25 search in Python, powered by Numpy and Numba
Developer friendly Natural Language Processing ✨
A Collection of BM25 Algorithms in Python
🧠 纯原生 Python 实现的 RAG 框架 | FAISS + BM25 混合检索 | 支持 Ollama / SiliconFlow | 适合新手入门学习
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。
Rust-powered code intelligence CLI for AI coding agents. Builds call graphs and hybrid semantic search indexes (Dense + Sparse + RRF + Reranker) across 7 languages. Ships as native MCP tools for Claude Code and Codex CLI.
The First Real-Time Search Analytics Database
Neural Search
Local-first persistent memory for AI coding agents (Claude Code, Cursor, Codex) over MCP. Decisions, lessons and facts live in one SQLite file on your disk. Offline, multilingual.
Supercharge AI Agents, Safely
对四种句子/文本相似度计算方法进行实验与比较
The high-performance .NET search engine based on pattern recognition.