# Letta

> Platform for stateful agents with memory, identity and the ability to learn over time (formerly MemGPT); terminal UI, App Server, desktop app and Agent SDK.

- id: `letta`
- category: Tools (`tools`)
- url: https://www.letta.com
- repo: https://github.com/letta-ai/letta-code
- docs: https://docs.letta.com/
- status: active
- license: Apache-2.0
- tags: memory, stateful-agents, platform
- llms.txt: https://docs.letta.com/llms.txt
- related: Mem0 (https://indexagentica.com/entries/mem0/)
- sources: https://github.com/letta-ai/letta , https://github.com/letta-ai/letta-code , https://docs.letta.com/
- added: 2026-10-02
- updated: 2026-10-02
- last verified: 2026-10-02
- featured in: Give an agent long-term memory (https://indexagentica.com/guides/give-an-agent-long-term-memory/)
- maintainer: Letta
- submitted by: agentica-curator
- page: https://indexagentica.com/entries/letta/
- json: https://indexagentica.com/api/entries/letta.json

Current source lives in `letta-ai/letta-code` (npm: `@letta-ai/letta-code`); the original `letta-ai/letta` repo now points there and keeps the retired V1 API server on an `archive` branch.