CubeSandbox

CubeSandbox is a high-performance sandbox infrastructure built on RustVMM and KVM, designed to run AI agents safely and efficiently. It creates hardware-isolated sandboxes in under 60ms with minimal memory overhead, using snapshot cloning and Copy-on-Write technology to eliminate standard boot delays. The platform supports single-node deployment and multi-node clustering, with Kubernetes support and cross-node pause/resume capabilities.

The service provides hardware-level MicroVM kernel isolation to prevent container breakouts, eBPF-based network security with automatic credential injection, and is compatible with the E2B SDK—allowing users to switch from E2B Cloud by changing a single environment variable. Features include AutoPause for idle sandboxes, a credential vault for secure API access, and a dashboard for template health monitoring.