Letta Desktop

Letta Desktop is chat.letta.com installed as a desktop app. It opens in its own window, with its own dock or taskbar icon, and launches like any other app. Under the hood, it is a progressive web app (PWA), so it stays up to date with the web app.

Install

Chrome or Edge

1. Open chat.letta.com.
2. Click the install icon at the right of the address bar. In Chrome you can also choose More (⋮) > Cast, save, and share > Install page as app; in Edge, choose Settings and more (…) > More tools > Apps > Install this site as an app.
3. Click Install.

If Letta Desktop is already installed, Chrome shows Open in app in the address bar when you visit chat.letta.com. Click it to switch to the app window.

Safari on macOS

Requires macOS Sonoma 14 or later.

1. Open chat.letta.com in Safari.
2. Choose File > Add to Dock, or click the Share button and choose Add to Dock.
3. Click Add.

Firefox

Firefox can install web apps only on Windows (Firefox 143 or later). On macOS or Linux, use Chrome, Edge, or Safari.

Keep using your local agents

The previous Letta Code Desktop app was deprecated on October 12, 2026 and no longer runs. Your local agents still exist: Desktop and the Letta CLI share ~/.letta/lc-local-backend by default.

Install the CLI, then run letta --backend local and use /agents to pick an existing local agent. To resume it directly, run letta --agent agent-local-<id> with its full agent ID (also available in the /agents list).

The desktop PWA requires a signed-in Letta Cloud account. For local agents, use the CLI, Agent SDK, or a custom UI on the App Server.