microsandbox

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Score7.1

Rank#5 of 22

From$49/mo

Free planYes

Runs onAPI, Linux, macOS, Self-hosted, Windows

Summary

microsandbox is a local-first runtime for running untrusted workloads such as AI agents, user code, plugins, CI jobs, scrapers, and automation. Each sandbox is a microVM with its own Linux kernel, filesystem, and network boundary, rather than sharing the host kernel like a container. The local runtime starts on a user's machine without a daemon, root service, or account. It can also run on the user's servers or clusters, and the cloud platform can be deployed in the user's infrastructure. SDKs are available for TypeScript, Rust, Python, Go, and Ruby, alongside a CLI and MCP workflows. It accepts OCI images from Docker Hub, GHCR, ECR, GCR, and other registries. Public internet access is enabled by default, but private, host-local, link-local, and metadata destinations are blocked; egress can be allowlisted or disabled. The runtime is open source under Apache 2.0. A free plan is available, with Builder at $49 per month and Teams at $299 per month. Microsandbox Cloud is in private beta and requires an access request.

Who it is for

microsandbox may suit developers and teams that need to run untrusted workloads locally or on their own infrastructure. Its language SDKs, CLI, and MCP workflows support several ways to connect to the runtime.

What is good

Each sandbox has its own Linux kernel
Local runtime needs no daemon, root service, or account
Supports five language SDKs
Egress can be allowlisted or disabled
Open source under Apache 2.0

What to know first

Cloud is in private beta
Cloud access requires a request
Secret substitution requires intercepted TLS by default

Verdict

microsandbox offers isolated microVM sandboxes, local operation, and self-hosting options. Check the credential-substitution limits and cloud access requirements against your deployment needs.

microsandbox plans and pricing

All plans

Free Free $0 per month 5 vCPU-hours · 20 memory GiB-hours · 20 disk GiB-hours · up to 3 sandboxes · each capped at 1 vCPU, 512 MiB memory, 8 GiB writable disk · 1 GiB durable storage · no overage rates microsandbox.dev · 30 Sept 2026

Builder $49/mo $49 per month 500 vCPU-hours · 2,000 memory GiB-hours · 2,000 disk GiB-hours · 50 GiB durable storage · 1,000 ephemeral-running · 50 persistent-running microsandbox.dev · 30 Sept 2026

Teams $299/mo $299 per month 2,000 vCPU-hours · 8,000 memory GiB-hours · 8,000 disk GiB-hours · 250 GiB durable storage · 25,000 ephemeral-running · 500 persistent-running microsandbox.dev · 30 Sept 2026

Enterprise Not published custom agreement 4,000 vCPU-hours · 16,000 memory GiB-hours · 16,000 disk GiB-hours · 500 GiB durable storage · ephemeral and persistent running limits set together · committed or BYOC model microsandbox.dev · 30 Sept 2026

Compared on sandbox software

Free plan: Yesmicrosandbox.dev
Paid from: $49/momicrosandbox.dev
Concurrent environments: 1,000 environmentsmicrosandbox.dev
Persistent storage: Yesmicrosandbox.dev
Network controls: Yesmicrosandbox.dev
API or CLI access: Yesmicrosandbox.dev
Deployment: bothmicrosandbox.dev

Facts

What it does: Microsandbox is a local-first microVM runtime for running untrusted workloads, including AI agents, user code, plugins, CI jobs, scrapers, and automation.docs.microsandbox.dev · 30 Sept 2026
Isolation: Each sandbox is a microVM with its own Linux kernel, filesystem, and network boundary, rather than a container sharing the host kernel.docs.microsandbox.dev · 30 Sept 2026
Local runtime: The local runtime starts on the user's machine without a daemon, root service, or account.microsandbox.dev · 30 Sept 2026
Cloud availability: Microsandbox Cloud is in private beta and requires users to request access.docs.microsandbox.dev · 30 Sept 2026
Self-hosting: The runtime can be run on the user's own servers or clusters, and the cloud platform can be deployed in the user's infrastructure.docs.microsandbox.dev · 30 Sept 2026
Integrations and languages: The product supports SDKs for TypeScript, Rust, Python, Go, and Ruby, plus a CLI and MCP workflows.microsandbox.dev · 30 Sept 2026
Images: The runtime accepts OCI images from Docker Hub, GHCR, ECR, GCR, or another registry.docs.microsandbox.dev · 30 Sept 2026
Credential handling: Bound secrets are represented by placeholders inside the sandbox and substituted host-side for supported intercepted requests to approved destinations.microsandbox.dev · 30 Sept 2026
Credential limitation: Secret substitution requires intercepted TLS by default, and body substitution is opt-in with format and size limits.microsandbox.dev · 30 Sept 2026
Snapshots: Local full snapshots can preserve disk, memory, and running processes; managed cloud currently supports disk snapshots from stopped persistent sandboxes and disk restore.microsandbox.dev · 30 Sept 2026
Support: The product FAQ directs users with questions to its Discord community.microsandbox.dev · 30 Sept 2026
License: The runtime is open source under the Apache 2.0 license.microsandbox.dev · 30 Sept 2026
Company: Microsandbox is designed and engineered by Super Rad Company, whose stated purpose is building tools for the agentic future.superrad.company · 30 Sept 2026