AI Engineering

Apr 22, 2026 · Cloud Computing

Cube Sandbox: An Open‑Source AI Sandbox Runtime with Sub‑60 ms Cold Starts

Cube Sandbox, an open‑source AI sandbox runtime built with RustVMM on KVM, achieves sub‑60 ms cold‑start times, under 5 MB memory per instance, and hardware‑level isolation, outperforming Docker containers and traditional VMs while remaining 100 % E2B compatible.