LlamaIndex vs MemGPT
Side-by-side from the Top 11 rankings of The 11 Best RAG Frameworks (2026) and 11 Best AI Agent Builder Platforms 2026 — LangChain, CrewAI & 9 Rivals Ranked, No Paid Listings. Last verified May 31, 2026.
The short answer
LlamaIndex ranks higher on Top 11 (#2 vs #11) for Developers shipping RAG pipelines into production / Developers building autonomous AI agents and workflows. A data-centric framework excelling at advanced indexing and retrieval strategies for high-accuracy RAG.
At a glance
| LlamaIndex | MemGPT | |
|---|---|---|
| Top 11 rank | #2 / The 11 Best RAG Frameworks (2026) | #11 / 11 Best AI Agent Builder Platforms 2026 — LangChain, CrewAI & 9 Rivals Ranked, No Paid Listings |
| Score (out of 9.4) | 9.2 | 7.1 |
| Best for | Best for data-centric RAG | Agents with persistent, long-term memory |
| Pricing | Free (Open Source) | Free (Open Source) |
| HQ | San Francisco, USA | Berkeley, USA |
| Founded | 2022 | 2023 |
LlamaIndex
A data-centric framework excelling at advanced indexing and retrieval strategies for high-accuracy RAG.
www.llamaindex.ai/MemGPT
A novel technique for giving agents persistent, long-term memory beyond context windows.
memgpt.ai/Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.