GraphRAG vs LightRAG
A side-by-side comparison of two self-hosted self-hosted ai options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | GraphRAG | LightRAG |
|---|---|---|
| Deploy effort | Read-the-docs project | ≈5-minute setup |
| Health score | 99 · Excellent | 99 · Excellent |
| Category | Self-Hosted AI | Self-Hosted AI |
| License | MIT | MIT |
| Language | Python | Python |
| Setup difficulty | Hard | Medium |
| Min. RAM | 4,096 MB | 2,048 MB |
| Deployment | source | docker, source |
| GitHub stars | ★ 36,085 | ★ 39,836 |
| First released | 2024 | 2024 |
| Replaces | OpenAI Assistants | OpenAI Assistants |
What are GraphRAG and LightRAG?
GraphRAG
GraphRAG is a research project from Microsoft that uses LLM-generated knowledge graphs to improve retrieval-augmented generation over private datasets. It can be run locally to index documents and answer complex queries.
- LLM-generated knowledge graphs
- Global and local query modes
- Community summarization
- Works on private data
LightRAG
LightRAG is a retrieval-augmented generation system that combines knowledge graphs with vector retrieval for more accurate answers over document collections. It offers a server and API and can be fully self-hosted.
- Graph-based retrieval
- Fast indexing
- REST API and server
- Multi-model support
GraphRAG vs LightRAG: key differences
Both projects are written in Python. LightRAG is the lighter option, starting around 2,048 MB of RAM against 4,096 MB for GraphRAG. LightRAG lists first-class Docker deployment; GraphRAG does not.
Why pick each one
Choose GraphRAG if…
- Better multi-hop answers
- Microsoft research backing
- Works on private data
Watch out for
- Expensive indexing runs
- Research-oriented tooling
Choose LightRAG if…
- Graph-enhanced retrieval
- Simple API server
- Multiple storage backends
Watch out for
- Indexing is LLM-heavy
- Fast-moving young project
Frequently asked questions
Is GraphRAG or LightRAG better?
LightRAG is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider GraphRAG if its specific feature set fits your needs better.
Are GraphRAG and LightRAG free and open-source?
Yes. GraphRAG is licensed under MIT and LightRAG under MIT. Both can be self-hosted at no software cost.
Can I run GraphRAG and LightRAG with Docker?
GraphRAG: check the project docs for container support. LightRAG: yes.
Which is lighter on resources, GraphRAG or LightRAG?
LightRAG has the smaller minimum footprint at 2,048 MB of RAM, compared to about 4,096 MB for GraphRAG. Real-world usage depends on library size, user count, and enabled features.