# LightRAG

Simple, fast graph-based RAG from HKU Data Science lab (EMNLP 2025). LightRAG is free, with no paid plan attached, at github.com.

## Facts

- **Pricing tier:** Free
- **Works on:** Self-hosted, CLI
- **Works in browser:** No

## Capabilities

- Simple, fast graph-based RAG from HKU Data Science lab (EMNLP 2025)
- Combines knowledge-graph and vector retrieval
- Works with local or hosted LLMs

## FAQ

### What is LightRAG?

LightRAG is listed under Agent Memory & RAG-as-a-Service, in the AI Agents & Automation category on Flocci AI Tools. Simple, fast graph-based RAG from HKU Data Science lab (EMNLP 2025). It is free, with no paid plan attached, and it lives at github.com.

### Is LightRAG free?

LightRAG is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 397 entries on Flocci AI Tools with no upgrade path built in.

### Can I use LightRAG in a browser, or is there an app?

LightRAG needs to be installed or self-hosted — it doesn't run in a browser tab. It is available on self-hosting and the command line.

### What can LightRAG do?

LightRAG does 3 things the catalog singles out: Simple, fast graph-based rag from hku data science lab (emnlp 2025); combines knowledge-graph and vector retrieval; works with local or hosted llms.

### What is the best free alternative to LightRAG?

MemOS is the closest free alternative: it sits in the same Agent Memory & RAG-as-a-Service sub-category and is free. RAGFlow, Basic Memory and Cognee also start free. The full list is on the alternatives page.

## Related

- [LightRAG alternatives](https://aitools.flocci.in/alternatives/lightrag)
- [Agent Memory & RAG-as-a-Service](https://aitools.flocci.in/category/ai-agents-automation/agent-memory-rag-as-a-service)
- [Best free AI agent memory and RAG services](https://aitools.flocci.in/best/best-agent-memory-rag-as-a-service)
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Source: Flocci AI Tools — https://aitools.flocci.in/tool/lightrag

Facts last verified: October 2026