Open source knowledge-graph projects
Every project in the registry tagged knowledge-graph, ranked by real GitHub adoption.
Turn any codebase, with its docs, SQL schemas, configs, and PDFs, into a queryable knowledge graph. A /graphify skill for Claude Code, Cursor, Codex, and Gemini
Graphs that teach > graphs that impress. Turn any code into an interactive knowledge graph you can explore, search, and ask questions about. Works with Claude C
Privacy-first knowledge base that connects your notes
[EMNLP2025] LightRAG: Simple and Fast Retrieval-Augmented Generation
Local-first code intelligence graph for MCP and CLI. Builds a persistent map of your codebase so AI coding tools read only what matters, with benchmarked contex
A distributed, fast open-source graph database featuring horizontal scalability and high availability
World's first open-source enterprise world model.
可私有部署的多租户知识智能体平台：统一 RAG、知识图谱、多智能体、MCP/Skills、沙盒与权限管理。Self-hosted knowledge agent platform for RAG, knowledge graphs and multi-agent workflows.
Graph database built for GraphRAG and multi-tenant AI apps
The ultimate RAG for your monorepo. Query, understand, and edit multi-language codebases with the power of AI and knowledge graphs
A bio-inspired cognitive memory engine — a new paradigm for Graph RAG.
Enterprise workplace AI with data you own and control
A personal knowledge base that builds and maintains itself. Drop in sources — Claude (or Codex/Gemini) reads them, extracts knowledge, and maintains a persisten
Framework for AI agents to build and maintain a digital brain through Obsidian wiki
PentestAgent is an AI agent framework for black-box security testing, supporting bug bounty, red-team, and penetration testing workflows.
Lakehouse native graph engine with git-style workflows
Build fast and accurate GenAI apps with GraphRAG SDK at scale 🌟
Lightweight Knowledge Base and Feed Reader.
Related tags
Frequently asked questions
How many open source knowledge-graph projects are there?
This registry tracks 18 projects tagged knowledge-graph, with 378,383 GitHub stars between them. The most-adopted is graphify at 118,991 stars.
Are these knowledge-graph projects free to use?
Yes — 17 of the 18 carry an explicit open-source licence across 3 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which knowledge-graph project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these knowledge-graph projects still maintained?
18 of the 18 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.