LightRAG is free, with no paid plan attached. MemOS is free, with no paid plan attached. Both are listed under Agent Memory & RAG-as-a-Service, so this is a like-for-like comparison. Neither is ranked above the other — Flocci carries no sponsored placement.
LightRAG is free, with no paid plan attached and is listed for simple, fast graph-based RAG from HKU Data Science lab (EMNLP 2025). MemOS is free, with no paid plan attached and is listed for memory operating system for LLM agents with hybrid retrieval and persistent memory. Both sit in Agent Memory & RAG-as-a-Service.
Neither — LightRAG and MemOS are both free, so the choice comes down to capability rather than cost. Both entries list what they uniquely do above.
Choose LightRAG if you need simple, fast graph-based RAG from HKU Data Science lab (EMNLP 2025); choose MemOS if you need memory operating system for LLM agents with hybrid retrieval and persistent memory. Flocci AI Tools does not rank one above the other — it shows both feature sets side by side and lets the requirement decide.
| LightRAG | MemOS | |
|---|---|---|
| Pricing tier | Free | Free |
| Free to start | Yes | Yes |
| Category | AI Agents & Automation | AI Agents & Automation |
| Type | Agent Memory & RAG-as-a-Service | Agent Memory & RAG-as-a-Service |
| Listed capabilities |
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| Tags | lightrag, graph rag simple fast, knowledge graph rag open source, hkuds lightrag | memos memory os, agent memory, llm long term memory, open source memory for agents, memtensor memos |
| Website | github.com | memos.openmem.net |
| Full page | LightRAG details → | MemOS details → |
| Alternatives | LightRAG alternatives → | MemOS alternatives → |