Cloud Ubuntu VM sandboxes for AI agents with a CLI, virtual desktop, and per-second billing.
Box provides full Ubuntu cloud VM sandboxes designed for AI agents and developers, pre-installed with Docker, GitHub CLI, languages, and devtools. Agents and users interact via a CLI (box new, box ssh, box prompt, box fork, box desktop), and each box can run Claude or Codex directly. Billing is per second with three size tiers; boxes snapshot and pause billing on stop. API and SDKs are available for programmatic use. Data can be kept in EU regions (Germany, Finland, France). Plans scale to 1,500 concurrent boxes. Box is a product of Ascii.