Browse free open source Semantic Search tools and projects for Windows below. Use the toggles on the left to filter open source Semantic Search tools by OS, license, language, programming language, and project status.
Open-source vector similarity search for Postgres
Official code repo for the O'Reilly Book
Semantic Search & Call Graphs for AI Agents
Private & local AI personal knowledge management app
Video-based AI memory library. Store millions of text chunks in MP4
MemU is an open-source memory framework for AI companions
Weaviate is a cloud-native, modular, real-time vector search engine
Haystack is an open source NLP framework to interact with your data
Semantic search and document parsing tools for the command line
AI enabled pair programmer for Claude, GPT, O Series, Grok, Deepseek
A calm, CLI-native way to semantically grep everything, like code
Multilingual sentence & image embeddings with BERT
Open source semantic search and text analytics for large document sets
A self-hosted open source photo management service
ID-based RAG FastAPI: Integration with Langchain and PostgreSQL
A local-first AI knowledge base & NotebookLM alternative
Examples and guides for using the OpenAI API
mini cli search engine for your docs, knowledge bases, etc.
A lightweight, lightning-fast, in-process vector database
RAG Search API
ETL framework to index data for AI, such as RAG
CPU/GPU inference server for Hugging Face transformer models
Official Microsoft Learn MCP Server, powering LLMs and AI agents
Bringing BERT into modernity via both architecture changes and scaling
Context database designed specifically for AI Agents