microsandbox

microsandbox is a microVM runtime that creates isolated local environments from OCI images for untrusted code execution.

Microsandbox creates lightweight virtual machines for running untrusted workloads. It functions as a local runtime that starts sandbox processes directly via an SDK, removing the need for host daemons or remote services. Users define sandboxes using OCI images from registries like Docker Hub or GHCR. The system supports local execution and can switch to hosted infrastructure using an API key. Supported SDKs include TypeScript, Rust, Python, Go, and Ruby. It is built for developers requiring secure, programmable Linux environments with controlled resources and networking.

microsandbox at a glance

Best for: Software engineer
Runs on: CLI
Pricing: Free
Released: October 2024
Category: AI coding tool
Website: docs.microsandbox.dev

Key features

Hardware-level isolation via microVMs
OCI image support for Docker Hub, GHCR, ECR, and GCR
SDKs for TypeScript, Rust, Python, Go, and Ruby
Direct process execution without host daemons
Configurable resources, volumes, secrets, and networking
Cloud-compatible runtime using the same SDK and CLI

Use it for

Running AI agent code and tools
Executing user-submitted scripts or notebooks
Isolating CI/CD build jobs and test environments
Creating disposable local Linux machines
Running secure scrapers and automation tools

Alternatives to microsandbox

CubeSandbox — Provides sub-60ms cold starts and hardware-level microVM kernel isolation.
Sandkiln — Runs untrusted code in hardware-isolated Firecracker microVMs.
OpenSandbox — Provides isolated environments with multi-language SDKs and lifecycle management.
forkd — Spawns 100 isolated microVMs in approximately 100 milliseconds.
AIO Sandbox — Provides an integrated environment for agents in a single Docker container.
Agent Sandbox — Provides a secure and isolated execution layer for autonomous AI agents.
Daytona — It provisions sandboxes in under 90 milliseconds with full security isolation.
AI Sandboxes by Buddy — Stateful virtual machines with persistent disks and public HTTPS endpoints.
E2B — Provides secure Linux VMs created on demand for AI agents.
Sandcastle — Orchestrates AI coding agents in isolated Docker, Podman, or Vercel sandboxes.
Devbox — Runs securely on your infrastructure with isolated sandboxes and credential proxies.
Crabbox — Run local commands on cloud VMs, SSH hosts, or containers via one CLI.

All microsandbox alternatives