MemGPT vs LangChain
Side-by-side from the Top 11 rankings of LangChain vs LlamaIndex vs CrewAI: 11 Best AI Agent Builder Platforms 2026 and LangChain vs LlamaIndex vs Haystack: 11 Best RAG Frameworks 2026. Last verified May 31, 2026.
The short answer
LangChain ranks higher on Top 11 (#1 vs #11) for Developers building autonomous AI agents and workflows / Developers shipping RAG pipelines into production. The most versatile framework with the largest ecosystem for building any type of LLM application, including advanced RAG.
At a glance
| MemGPT | LangChain | |
|---|---|---|
| Top 11 rank | #11 / LangChain vs LlamaIndex vs CrewAI: 11 Best AI Agent Builder Platforms 2026 | #1 / LangChain vs LlamaIndex vs Haystack: 11 Best RAG Frameworks 2026 |
| Score (out of 9.4) | — | 9.3 |
| Best for | Agents with persistent, long-term memory | Most versatile & integrated |
| Pricing | Free (Open Source) | Free (Open Source) |
| HQ | Berkeley, USA | San Francisco, USA |
| Founded | 2023 | 2022 |
MemGPT
A novel technique for giving agents persistent, long-term memory beyond context windows.
memgpt.ai/See full entry in LangChain vs LlamaIndex vs CrewAI: 11 Best AI Agent Builder Platforms 2026
LangChain
The most versatile framework with the largest ecosystem for building any type of LLM application, including advanced RAG.
www.langchain.com/See full entry in LangChain vs LlamaIndex vs Haystack: 11 Best RAG Frameworks 2026
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.