LightRAG alternatives

HKUDS/LightRAG (40k stars, +35 this week): [EMNLP2025] LightRAG: Simple and Fast Retrieval-Augmented Generation. Why it matters: relevant for grounding LLMs in your own data.

Below are 5 other RAG / vector repos tracked by OSS Radar that share at least two GitHub topics with LightRAG, ordered by how many topics overlap, then by stars gained in the last 7 days. Topic overlap means a similar problem space, not a drop-in replacement, so check each project's README.

1. 1. deeplethe/utopia

   +63/wkest.

   World's first open-source enterprise world model. Why it matters: relevant for grounding LLMs in your own data.

   8.3k stars · Rust · shared topics: graphrag, knowledge-graph, llm, rag

2. 2. NirDiamant/RAG_Techniques

   +49/wkest.

   A collection of runnable notebook tutorials covering techniques for building Retrieval-Augmented Generation (RAG) systems. Why it matters: relevant for grounding LLMs in your own data.

   30k stars · Jupyter Notebook · shared topics: gpt, llm, rag, retrieval-augmented-generation

3. 3. microsoft/graphrag

   +28/wkest.

   A modular graph-based Retrieval-Augmented Generation (RAG) system. Why it matters: relevant for grounding LLMs in your own data.

   36k stars · Python · shared topics: gpt, graphrag, llm, rag

4. 4. FalkorDB/FalkorDB

   +217/wkest.

   A super fast Graph Database uses GraphBLAS under the hood for its sparse adjacency matrix graph representation. Why it matters: relevant for grounding LLMs in your own data.

   9.6k stars · Rust · shared topics: graphrag, knowledge-graph

5. 5. infiniflow/ragflow

   +77/wkest.

   RAGFlow is a leading open-source Retrieval-Augmented Generation (RAG) engine that fuses cutting-edge RAG with Agent capabilities to create a… Why it matters: relevant for grounding LLMs in your own data.

   92k stars · Go · shared topics: rag, retrieval-augmented-generation

More: all trending RAG / vector repos · compare LightRAG with the top 2