CubeSandbox
Lightweight, concurrent sandbox for running AI agent code securely.
Updated
✨ Try AgentScout's free AI image generator →Good for: writing code, running code safely
Use cases
About CubeSandbox
CubeSandbox is listed in our sandboxes & code execution category and is aimed at builders. Lightweight, concurrent sandbox for running AI agent code securely. Pricing, as the maker states it: Open source. Maturity: Mature. We last checked the official link on 2026-10-16.
What is CubeSandbox?
CubeSandbox, from Tencent Cloud, is a secure sandbox service for AI agents built on RustVMM and KVM, deployable on a single node or as a multi-node cluster.
It is compatible with the E2B SDK, and the README says it can create a hardware-isolated sandbox in under 60 ms with less than 5 MB of memory overhead. Version 0.7 added cross-node pause and resume.
Sources: the official README and our directory listing, checked 2026-10-18. Official site: github.com/TencentCloud/CubeSandbox.
Who is CubeSandbox for?
Teams who need fast, hardware-isolated sandboxes for agent code at scale.
CubeSandbox at a glance
- Open source: Yes (Apache-2.0 (third-party components under their own licences))
- GitHub: TencentCloud/CubeSandbox · 12,990 stars (as of Oct 21, 2026)
Key features
- KVM-based hardware isolation
- E2B SDK compatible
- Fast startup, low overhead
- Single node or cluster
CubeSandbox FAQ
What is CubeSandbox?
CubeSandbox, from Tencent Cloud, is a secure sandbox service for AI agents built on RustVMM and KVM, deployable on a single node or as a multi-node cluster.
Who is CubeSandbox for?
Teams who need fast, hardware-isolated sandboxes for agent code at scale.
Is CubeSandbox free?
CubeSandbox's pricing, as the maker states it: Open source. Open-source tools are free to use, though you may still pay for model API usage or a hosted plan. Check the official site for current plans.
Is CubeSandbox open source?
Yes. CubeSandbox is released under Apache-2.0 (third-party components under their own licences), according to its GitHub repository.
What are alternatives to CubeSandbox?
Similar tools include microsandbox, Judge0, AIO Sandbox, BoxLite, Zeroboot and Cloudflare Sandbox SDK.
CubeSandbox ratings and reviews
Be the first to rate CubeSandbox: tap 1 to 5 stars below. A written review is optional.
CubeSandbox alternatives
Other sandboxes & code execution tools in our directory. See all sandboxes & code execution tools →
microsandbox
Local-first microVM runtime for running untrusted agent code safely.
Judge0
Sandboxed code execution system for running untrusted code from people and AI.
AIO Sandbox
All-in-one Docker sandbox for AI agents that combines a browser, shell, files, MCP, VS Code Server and Jupyter in one container.
BoxLite
Embeddable micro-VM for running AI agents.
Zeroboot
VM sandboxes for running agent code that start in under a millisecond by forking a warm snapshot with copy-on-write memory.
Cloudflare Sandbox SDK
SDK for running isolated code sandboxes on Cloudflare's network, so agents can execute commands and files safely from a Worker.
Popular searches with this tool
🧭 Task guides: Sandboxes and secure execution tools for coding agents
Badge for makers
Built CubeSandbox? Add this badge to your README or site. It links back to this page. About badges
