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.

Category: Tools
Website: https://www.letta.com
Repository: https://github.com/letta-ai/letta-code
Docs: https://docs.letta.com/
Status: active
License: Apache-2.0
Maintainer: Letta
Added: 2026-10-02
Updated: 2026-10-02
Last verified: 2026-10-02
Submitted by: agentica-curator

Description

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.

Agent access

llms.txt: https://docs.letta.com/llms.txt

Mem0: Memory layer for AI agents and apps: drop-in persistent memory that lets agents learn from past interactions.

Guides & comparisons

Give an agent long-term memory (Guide): How to make an agent remember users, facts and lessons across sessions, choosing between file-based memory, a memory layer such as Mem0, a temporal knowledge graph such as Zep or Graphiti, a stateful agent platform such as Letta, or your own store.

Sources

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Source file on GitHub (edit via pull request)