Letta
Platform for building stateful AI agents with long-term memory that learn and self-improve over time, from the creators of MemGPT.
Cost / License
- Freemium (Subscription)
- Open Source (Apache-2.0)
Application type
Platforms
- Online
- Linux
- Mac
- Windows
- Self-Hosted
Letta News & Activities
Recent activities
- Filippo-Pilotta added Letta
- POX updated Letta
Filippo-Pilotta added Letta as alternative to Cortex by SKYNETLAB, Zep, Graphiti and Supermemory
Letta information
Developed by
LettaLicensing
Open Source (Apache-2.0) and Freemium product.Pricing
Subscription that costs $20 per month + free version with limited functionality.Alternatives
3 alternatives listedSupported Languages
- English
AlternativeTo Category
AI Tools & ServicesGitHub repository
- 24,452 Stars
- 2,597 Forks
- 39 Open Issues
- Updated
What is Letta?
Letta, formerly known as MemGPT, is a platform for building stateful AI agents with advanced, self-editing memory. Born from the MemGPT research project at UC Berkeley, it gives agents a virtual context that persists beyond a single conversation: agents decide what to store, rewrite their own memory blocks and keep learning across sessions. It is model-agnostic, works with OpenAI, Anthropic and local models, exposes agents through REST APIs and SDKs in Python and TypeScript, and ships a visual Agent Development Environment for inspecting exactly what an agent remembers. The core server is open source and can be self-hosted with Docker, while Letta Cloud offers a managed deployment.