Run parallel coding agents in cloud sandboxes.

3 min read Original article ↗

Y Backed by Y Combinator

Create parallel Codex + Claude Code sessions with your own config and subscription. Full dev environments for testing and verification from any device.

Desktop view of a remote coding session

Mobile view of the same remote coding session

Everything you need to ship faster

Start from Slack, Linear, or GitHub

Tag Cord in a Slack channel or assign a Linear ticket — an agent spins up, writes the code, and opens a PR. No context switching.

Slack integration triggering a Cord agent

Bring your Codex plan or API keys

Use your existing AI subscription directly — or bring API keys. No double-paying, no vendor lock-in.

Using a Codex subscription inside Cord

See your changes with a live preview

Each sandbox runs its own dev server with a unique preview URL. Use it to check your changes, share it with teammates or let the agent verify its own work.

Cord's own preview environment running inside Cord
Cord's own preview environment — running inside Cord

Code from your phone

Record a voice message to start an agent, review diffs on the go, and merge from anywhere.

Voice recording to start a coding agent on mobile

Common questions

Which coding agents does Cord support?

Cord supports Claude Code and OpenCode. Use Claude Code with your existing Claude subscription or API key. OpenCode works with any model provider — including a Codex subscription. You bring your own plan or keys; Cord provides the infrastructure.

Can I self-host Cord?

Yes. The enterprise plan includes self-hosting, so you can run Cord on your own infrastructure with full control over data and security. Contact us to learn more.

How does sandbox pricing work?

You only pay for compute you actually use. Sandboxes spin up in seconds and automatically suspend when idle. When you come back, they resume instantly. The free tier includes unlimited sandboxes.

What about my .claude folder, dotfiles, and test artifacts?

Every user gets persistent storage that carries over across sandbox sessions. Your .claude directory, personal dotfiles, test artifacts, and anything else that doesn't belong in the repo stays available every time you start a new sandbox.

How are environment variables handled?

Upload them in your repository settings. They're stored encrypted in the database and automatically injected into every sandbox on startup.

Does Cord support Docker?

Yes. Docker builds are fully supported inside sandboxes.

What sandbox provider does Cord use?

Daytona is the default sandbox provider. For teams that need more scale, Cord also supports Modal.

Simple, transparent pricing

  • 25 sandbox hours
  • Up to 3 repositories
  • Slack & Linear integrations
  • 250 sandbox hours per dev
  • Unlimited repositories
  • Deploy on your own cloud
  • Unlimited sandbox hours
  • Unlimited repositories
  • Slack & Linear integrations
  • SSO & access controls
  • Priority support

All plans work with your existing Claude or Codex subscription, or bring your own API keys.