L
Letta
Stateful agents with long-term memory — formerly MemGPT — 15K stars
Open SourceFree
Install
pip install lettaAbout
Letta (formerly MemGPT) is a framework for building stateful AI agents with persistent long-term memory. It implements a virtual context management system that allows agents to maintain conversation history, user preferences, and knowledge across sessions. Provides a server runtime, REST API, and Python SDK for production deployment.
Details
| Language | python |
| Patterns | memory-management, stateful-agents, virtual-context, rest-api |
| Install | pip install letta |
Tags
memorystatefulpythonlong-term-memoryagentsopen-source
Quick Info
- Organization
- Letta
- Pricing
- open-source
- Free Tier
- Yes
- Updated
- Mar 27, 2026
15.0K120.0K/w5d ago150
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