microsandbox vs zeroboot
Local microVM sandboxes compared
microsandbox and zeroboot both isolate untrusted code in virtual machines, with Rust implementations and Apache-2.0 licenses. microsandbox is a local runtime with CLI and SDK workflows, while zeroboot focuses on quickly forking Firecracker VM snapshots and offers both self-hosting and a managed API.
microsandbox: Run Untrusted Workloads in Local MicroVMs
Microsandbox is a Rust microVM runtime for isolating untrusted workloads, including AI agents, user code, and CI jobs. It runs locally on macOS, Linux, and Windows, with hardware virtualization requirements that vary by platform.
zeroboot: Create Fast VM Sandboxes for AI Agents
Zeroboot uses copy-on-write forks of Firecracker VM snapshots to create isolated sandboxes quickly for code execution. It is aimed at teams running agent-generated code that need VM-level isolation and can accept a working-prototype maturity level.
| microsandbox | zeroboot | |
|---|---|---|
| Language | Rust | Rust |
| License | Apache-2.0 | Apache-2.0 |
| Stars | 8.8k | 2.5k |
| Forks | 494 | 110 |
| Last analyzed | Oct 28, 2026 | Oct 3, 2026 |
Key differences
- microsandbox provides a local runtime with CLI lifecycle, image, and volume workflows; zeroboot creates instances by forking prepared Firecracker VM snapshots with copy-on-write memory.
- microsandbox supports macOS, Linux, and Windows when required virtualization support is available; zeroboot self-hosting requires Linux with KVM.
- microsandbox offers SDKs for TypeScript, Rust, Python, and Go, plus a Ruby README example; zeroboot provides Python and TypeScript SDKs and an HTTP API.
- microsandbox is described as beta software; zeroboot is described as a working prototype and not production-hardened.
- microsandbox supports configurable network access and secrets handling; zeroboot forks have no networking and communicate through serial I/O.
- microsandbox targets local and self-hosted use; zeroboot also offers a managed API.
Choose microsandbox if you…
- need a local runtime with CLI workflows for managing sandboxes, images, and volumes.
- want SDK options across TypeScript, Rust, Python, and Go, or a Ruby example.
- need configurable network access or secrets handling in a sandbox workflow.
Choose zeroboot if you…
- want to fork prepared Firecracker VM snapshots using copy-on-write memory.
- need an HTTP API and Python or TypeScript SDKs for sandbox execution.
- want to try a managed code-execution API or self-host on Linux with KVM.
Compare the numbers side by side, or add more projects
This comparison is generated with AI from the OSRepos analyses of both projects. Always check each project's repository and documentation before choosing.