Cube Sandbox by Tencent

Cube Sandbox is an open-source high-performance sandbox runtime for AI agents built on RustVMM and KVM. It achieves sub-60ms cold starts, under 5MB memory per instance, hardware-level kernel isolation, and supports thousands of concurrent sandboxes per node. 100% E2B SDK compatible with zero code changes to migrate.

Cube Sandbox is an open-source high-performance sandbox runtime for AI agents built on RustVMM and KVM. It achieves sub-60ms cold starts, under 5MB memory per instance, hardware-level kernel isolation, and supports thousands of concurrent sandboxes per node. 100% E2B SDK compatible with zero code changes to migrate.

• 01Sub-60ms cold start — 2.5-50x faster than alternatives
• 02Under 5MB memory per instance with hardware-level kernel isolation
• 03100% E2B SDK compatible — zero code changes needed to migrate