# Unified Knowledge Graph RAG on AWS: GraphRAG and LightRAG on one stack

DevFeed: [Unified Knowledge Graph RAG on AWS: GraphRAG and LightRAG on one stack](<https://devfeed.tech/articles/unified-knowledge-graph-rag-on-aws-graphrag-and-lightrag-on-one-stack-21545.md>)

Original publisher: [Read original article](<https://aws.amazon.com/blogs/opensource/unified-knowledge-graph-rag-on-aws-graphrag-and-lightrag-on-one-stack/>)

Author: Jonas Kim

Published: 2026-09-14T16:55:58Z

Content type: article

Language: en

Sources: [AWS Open Source Blog](<https://devfeed.tech/sources/aws-open-source-blog.md>)

Topics: [Retrieval Augmented Generation (RAG)](<https://devfeed.tech/topics/retrieval-augmented-generation-rag.md>), [Graphs](<https://devfeed.tech/topics/graphs.md>), [Amazon Bedrock](<https://devfeed.tech/topics/amazon-bedrock.md>), [Amazon OpenSearch Service](<https://devfeed.tech/topics/amazon-opensearch-service.md>), [Amazon Web Services](<https://devfeed.tech/topics/aws.md>)

Tags: [amazon-bedrock](<https://devfeed.tech/tags/amazon-bedrock.md>), [amazon-opensearch-service](<https://devfeed.tech/tags/amazon-opensearch-service.md>), [aws](<https://devfeed.tech/tags/aws.md>), [knowledge-graph](<https://devfeed.tech/tags/knowledge-graph.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [rag](<https://devfeed.tech/tags/rag.md>), [retrieval](<https://devfeed.tech/tags/retrieval.md>), [search](<https://devfeed.tech/tags/search.md>), [vector-search](<https://devfeed.tech/tags/vector-search.md>)

## AI overview

This article presents a unified knowledge-graph RAG stack that brings Microsoft GraphRAG and HKUDS LightRAG together on Amazon Bedrock, Amazon Neptune, and Amazon OpenSearch Service. The shared stack supports common ingestion, indexing, caching, and multilingual handling while allowing the retrieval methodology to be selected per query.

## Source excerpt

Picture a compliance analyst staring at a few thousand contracts, amendments, and internal memos, trying to answer one question that sounds straightforward: "Which of our obligations are exposed if this one milestone slips?" The answer isn't written in any single document. It's stitched across three -- a master agreement that ties a payment to a [...]