Pyyan / Compare / LightRAG vs GraphRAG
LightRAG vs GraphRAG
2 of 5RAG & Knowledge Graphs · verified 13 Aug 2026
HLightRAGHKU Data Sciencecurrent
GraphRAGMicrosoftcurrent| Specification | LightRAG | GraphRAG |
|---|---|---|
| Summary | Graph retrieval at a fraction of GraphRAG's cost. | Build a knowledge graph first, then query it. |
| Kind | Library | Library |
| Graph | Yes, core | Yes, core |
| Language | Python | Python |
| Licence | MIT | MIT |
| GitHub stars | ~18k | ~25k |
| Category | RAG & Knowledge Graphs | RAG & Knowledge Graphs |
| Official | HKU Data Science ↗ | Microsoft ↗ |
Highlighted rows are where these differ.
LightRAG
- Dual-level retrieval over a lighter graph
- Runs on CPU, which GraphRAG does not comfortably
Best for graph RAG on modest hardware.
GraphRAG
- Extracts entities and relationships, then summarises communities
- Answers “what are the themes here” which vector search cannot
- Expensive to index
Best for questions no single chunk can answer.