Letta Code

Letta Code is an AI agent platform that builds stateful agents with persistent memory and continuous learning.

Letta Code is a memory-first agent that takes actions on your local computer and remembers everything. It builds personalized stateful agents with unique identities, custom skills, and tools that improve over time. The platform supports sleep-time compute for learning during idle time and uses git-backed versioning through MemFS for context. Users can communicate with agents via Slack, Discord, Telegram, or custom channels, and run them locally, in the cloud, or on remote devices. It works with OpenAI Codex, Z.AI, and custom API keys or subscription plans.

Letta Code at a glance

Best for: Software engineer
Runs on: Web, macOS, Slack, CLI, API, self-hosted
Pricing: Free with your own API keys or existing coding plans
Released: October 2025
Category: AI coding tool
Website: letta.com

Key features

Persistent memory with git-tracked MemFS
Sleep-time compute for continuous learning
Custom skills and tool support
Schedule tasks and proactive execution
Remote device and sandbox connection
Integration with Slack, Discord, and Telegram

Use it for

Build stateful agents that remember everything
Run tasks on a schedule proactively
Collaborate with agents in team chat apps
Manage long-horizon information retrieval

Companions

Tools that articles about Letta Code recommend using with it, each with its job.

Context7 — Provides up-to-date documentation for AI agents and code editors.
Ollama — Run local models at zero marginal cost, with code kept on your machine.
OpenRouter — Access over 500 models and 80 providers through one unified API.
Composio — Equips AI agents with tools, managed user auth, and sandboxes across 1,500+ apps
Oh My OpenCode Slim — Lightweight multi-agent orchestration and background tasks.

Alternatives to Letta Code

OpenCode — Works with 75+ model providers, local models, and existing subscriptions
AI Memory — Shared memory for coding agents that works across machines and team members.
Daytona — It provisions sandboxes in under 90 milliseconds with full security isolation.
Engram — Single Go binary with zero dependencies and built-in full-text search.
jcode — Optimized for massive parallelism with low memory usage per session.
OptMem — Provides permanent agent memory with fast lookups and no background processes.
Cloudflare Agents — Runs agents on a global network with durable storage and real-time connections.
Lody — Run coding agents in parallel with isolated worktrees and live diff reviews.
Git AI — It moves work to the server and handles concurrent tasks without standard Git bottlenecks.
Snippet Service — It runs locally, keeps sessions on disk, and provides a companion app for remote steering.
Turnbook — Saves every chat turn locally with zero model tokens and shares memory across AI apps.
Factorai — Manages multiple independent AI coding agents in parallel from one interface.

All Letta Code alternatives