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Tencent•April 25, 2026
Cube Sandbox by Tencent
Paid
sandbox
ai-agents
open-source
RustVMM
KVM
microVM
E2B-compatible
### TL;DR
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.
Key Insights & Metrics
Pricing
Open Source
Cost structure
Version
0.1.0
Current release version
Hardware
Linux with KVM support
Compute requirements
Category
Paid
Licensing model
Region
China
Primary region
Key Features
- Sub-60ms cold start — 2.5-50x faster than alternatives
- Under 5MB memory per instance with hardware-level kernel isolation
- 100% E2B SDK compatible — zero code changes needed to migrate
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