# Letta

> Letta is the open-source stateful-agent framework renamed from MemGPT in September 2024; MemGPT originated as a paper (arXiv:2310.08560) from the UC Berkeley Sky Computing Lab and Letta Inc. is led by its original authors.

Open-source framework for stateful agents, formerly MemGPT.

- **Category:** Memory & State
- **License:** Apache-2.0
- **Language:** Python
- **Self-hosted:** Yes
- **GitHub stars:** 25025 (2026-10-04)
- **Repository:** https://github.com/letta-ai/letta
- **Last verified:** 2026-10-04

Source: https://agent.c8.fit/tools/letta/