Skip to main content
Tesser gives every git worktree its own Linux machine in the cloud, called a box. You and your agent keep editing on your laptop. When the agent needs to run something, it calls tesser, which copies the worktree to its box and runs the command there, and the dev server it starts opens on your laptop at localhost.

​
Many worktrees at once

Every worktree gets its own box, so five agents on one repo never fight over port 3000 or your laptop’s CPU. Each box has its own address on your laptop, and a panel on the page switches which branch bare localhost:3000 shows.

​
Local and cloud agents

Claude Code and Codex run tesser from your laptop once you install the skill. Cloud agents like Devin sign in with an API token or a grant and get the same boxes.

​
Previews

tesser share <box_id> prints a link to a running branch. A teammate opens it and sees the branch at box-<id>.localhost:<port>, uncommitted changes included, so a pull request gets reviewed against the running app. Invite teammates and share a running branch has the details.

​
Pricing

Usage is metered per second and shown on the dashboard. The pricing page has the rates. An org you create from the dashboard or the CLI starts with no credit, so launching or waking a box fails with credit_exhausted until an admin upgrades the org on the dashboard’s Billing tab.

​
Where to go

Quickstart

Install the CLI, sign in, and get a dev server running on a box.

Let your agent drive the boxes

Install the tesser skill so Claude Code or Codex can run the boxes for you.

CLI reference

Every command and its flags.

How it works

What runs on the laptop, what runs on the box, and what the control plane does.

Where your code goes

Every hop your source takes, and what the control plane receives.

Run boxes in your own AWS account

Run the boxes in your account while Tesser hosts the control plane.