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Top 23 Python knowledge-graph Projects
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Project mention: Show HN: Query years of Ask HN and Show HN discussions as local knowledge graph | news.ycombinator.com | 2026-05-10
I built lightrag-snkv, Basically it uses lightRAG https://github.com/HKUDS/LightRAG ,this requires various storage databases like key value store, graph database, vector database, I built single embedded file based database which covers all these requirements: https://github.com/hash-anu/snkv.
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code-review-graph
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 context reductions on reviews and large-repo workflows.
Project mention: Code-review-graphv 2.1.0, 8× fewer tokens for code reviews via structural graph | news.ycombinator.com | 2026-04-03• True zero-config install — one command across 7 platforms
Tech: Python + Tree-sitter + SQLite (WAL) + FastMCP. 572 tests.
https://code-review-graph.com
GitHub: https://github.com/tirth8205/code-review-graph
pip install code-review-graph && code-review-graph install
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cognee
Cognee is the open-source AI memory platform for agents. Give your AI agents persistent long-term memory across sessions with a self-hosted knowledge graph engine.
topoteretes/cognee
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KAG
KAG is a logical form-guided reasoning and retrieval framework based on OpenSPG engine and LLMs. It is used to build logical reasoning and factual Q&A solutions for professional domain knowledge bases. It can effectively overcome the shortcomings of the traditional RAG vector similarity calculation model.
Project mention: The AI-Native GraphDB + GraphRAG + Graph Memory Landscape & Market Catalog | dev.to | 2025-10-26KAG (OpenSPG) - github.com/OpenSPG/KAG
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🌐 Official website https://potpie.ai
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MemMachine
Universal memory layer for AI Agents. It provides scalable, extensible, and interoperable memory storage and retrieval to streamline AI agent state management for next-generation autonomous systems.
Project mention: MemMachine, an open-source memory layer for advanced AI agents | news.ycombinator.com | 2025-11-21 -
llm-wiki-agent
A personal knowledge base that builds and maintains itself. Drop in sources — Claude (or Codex/Gemini) reads them, extracts knowledge, and maintains a persistent interlinked wiki. Works with Claude Code, Codex, OpenCode, Gemini CLI. No API key needed.
Project mention: Show HN: Claude Soul – cross-session learning engine for Claude Code | news.ycombinator.com | 2026-05-18I'm really interested in trying this out. Currently, I'm using the standard Obsidian MD format for long-term memory (https://github.com/SamurAIGPT/llm-wiki-agent) and asking the agent to access the wiki at the start of the task and then record useful information at the end
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WFGY
Verification-first reasoning engine for LLMs, with reproducible demos and audit-oriented specifications. Includes WFGY 3.0 Singularity Demo (public spec) and engineering failure maps for real systems.
Project mention: Show HN: A text-only reasoning core for LLMs (MIT, system prompt and self-test) | news.ycombinator.com | 2026-02-13 -
graphify
AI coding assistant skill (Claude Code, Codex, OpenCode, OpenClaw). Turn any folder of code, docs, papers, or images into a queryable knowledge graph
Project mention: How Graphify Stopped My Team from Burning Through Cursor's Context Window | dev.to | 2026-06-21Check out the Graphify repo for the full docs. If you're on Cursor specifically, the .mdc integration is the smoothest path — it just works.
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dgl-ke
High performance, easy-to-use, and scalable package for learning large-scale knowledge graph embeddings.
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Semantica
Semantica 🧠 • Build AI systems that can explain, trace, and justify every decision. Knowledge graphs, context graphs, reasoning engines, provenance, and governance for production AI.
Project mention: Show HN: Semantica – Explainable GraphRAG with Provenance | news.ycombinator.com | 2026-02-03 -
Project mention: KGGen: Extracting Knowledge Graphs from Plain Text with Language Models | news.ycombinator.com | 2026-01-05
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ApeRAG
ApeRAG: Production-ready GraphRAG with multi-modal indexing, AI agents, MCP support, and scalable K8s deployment
Project mention: The AI-Native GraphDB + GraphRAG + Graph Memory Landscape & Market Catalog | dev.to | 2025-10-26GitHub: https://github.com/apecloud/ApeRAG
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contextualise
Contextualise is an effective tool particularly suited for organising information-heavy projects and activities consisting of unstructured and widely diverse data and information resources
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Project mention: The AI-Native GraphDB + GraphRAG + Graph Memory Landscape & Market Catalog | dev.to | 2025-10-26
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Project mention: Graph RAG finds what's similar. We should aim for what's relevant | news.ycombinator.com | 2026-04-18
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Python knowledge-graph discussion
Python knowledge-graph related posts
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How Graphify Stopped My Team from Burning Through Cursor's Context Window
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Build a full knowledge graph locally with any video
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DeepFork – reverse-engineer any OSS repo into a clean-room rebuild blueprint
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Two Pre-Registered Benchmarks for Audit-Native RAG: RAB (EU AI Act 10/12/19) + LRB (Time-Travel Retrieval)
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Create Agents that are Traceable, detect loops and have a shared memory
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Cheese Paper: a text editor specifically designed for writing
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🔬 Direction 1 closure on JAMES — when the hypothesis fails but the data turns "7-tier monotonic natural-stop gradient"
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A note from our sponsor - SaaSHub
www.saashub.com | 21 Jun 2026
Index
What are some of the best open-source knowledge-graph projects in Python? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | MiroFish | 66,672 |
| 2 | LightRAG | 36,766 |
| 3 | code-review-graph | 18,665 |
| 4 | cognee | 17,885 |
| 5 | KAG | 8,834 |
| 6 | potpie | 5,458 |
| 7 | RecBole | 4,434 |
| 8 | DeepKE | 4,425 |
| 9 | MemMachine | 3,120 |
| 10 | llm-wiki-agent | 2,925 |
| 11 | ai-knowledge-graph | 2,310 |
| 12 | WFGY | 1,757 |
| 13 | graphify | 1,469 |
| 14 | dgl-ke | 1,329 |
| 15 | Semantica | 1,229 |
| 16 | kg-gen | 1,203 |
| 17 | ApeRAG | 1,193 |
| 18 | contextualise | 1,097 |
| 19 | GraphRAG-SDK | 945 |
| 20 | Nucleoid | 751 |
| 21 | pygraft | 707 |
| 22 | qagnn | 662 |
| 23 | m_flow | 539 |
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