CubeSandbox

CubeSandbox, open-sourced by Tencent Cloud, is an instant, concurrent, secure, and lightweight sandbox service designed for AI Agents. Built on RustVMM and KVM, it ensures true hardware-level isolation. It features blazing-fast cold starts (under 60ms) and ultra-low memory overhead (<5MB), enabling high-density deployment of thousands of agents per node. Fully compatible with the E2B SDK for drop-in migration, it also utilizes the CubeCoW engine to support millisecond-level snapshots, instant cloning, and rollbacks, perfectly integrating with ecosystems like OpenClaw.

• Sub-60ms blazing-fast cold start
• <5MB memory overhead for extreme density
• Hardware-level isolation via dedicated kernel
• Zero-cost drop-in E2B SDK compatibility
• Millisecond-level snapshot, clone & rollback