CubeSandbox AI Sandbox Skill

Skill by ara.so — Daily 2026 Skills collection.

CubeSandbox is a high-performance secure sandbox service built on RustVMM and KVM. It provides hardware-isolated (dedicated Guest OS kernel) sandbox environments that start in under 60ms, consume less than 5MB memory overhead per instance, and are fully compatible with the E2B SDK — making it a drop-in replacement for E2B with better performance and true VM-level isolation.

What CubeSandbox Does

• Spins up KVM-backed microVMs in <60ms using snapshot cloning + CoW memory
• Provides thousands of concurrent isolated sandboxes per node (<5MB RAM overhead each)
• Offers E2B SDK compatibility — just change one env var to migrate
• Enforces kernel-level network isolation via eBPF (CubeVS)
• Supports single-node and multi-node cluster deployments
• Enables code execution, shell commands, file ops, browser automation, and RL training