Pyyan / Compare / LightRAG vs LangChain & LangGraph
RAG & Knowledge Graphs · verified 13 Aug 2026
| Specification | LightRAG | LangChain & LangGraph |
|---|---|---|
| Summary | Graph retrieval at a fraction of GraphRAG's cost. | Orchestration, with retrieval as one piece. |
| Kind | Library | Framework |
| Graph | Yes, core | Via integrations |
| Language | Python | Python, TypeScript |
| Licence | MIT | MIT |
| GitHub stars | ~18k | ~120k |
| Category | RAG & Knowledge Graphs | RAG & Knowledge Graphs |
| Official | HKU Data Science ↗ | LangChain ↗ |
Highlighted rows are where these differ.
Best for graph RAG on modest hardware.
Best for agents that retrieve as one step among many.