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No. 6 of 22 ·Sandbox Software

microsandbox

Windows · Mac · Linux · Self-hosted · API · paid plans from $49/mo

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Freedom report

Three barsScore 6.5

  • Free tierA free tier is on its own pricing page
  • Open codeNo open-source code on record
  • Runs widely3 of 6 device platforms
  • DocumentedPlans, terms and facts published

microsandbox is a local-first microVM runtime for running untrusted workloads, including AI agents, user code, plugins, CI jobs, scrapers, and automation. Each sandbox has its own Linux kernel, filesystem, and network boundary, rather than sharing the host kernel as containers do. The local runtime starts on a user's machine without a daemon, root service, or account; it can also run on personal servers or clusters. The product supports TypeScript, Rust, Python, Go, and Ruby SDKs, as well as a CLI and MCP workflows, and accepts OCI images from Docker Hub, GHCR, ECR, GCR, or other registries. Public internet access is enabled by default, while 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. Its Free plan costs 0.00 USD per month and allows up to three sandboxes, each capped at 1 vCPU, 512 MiB memory, and 8 GiB writable disk. Builder costs 49.00 USD per month. Microsandbox Cloud is in private beta and requires an access request.

Who it is for

microsandbox is for developers and teams that need to run untrusted code or automation in isolated environments. It may suit users who want a local runtime or deployment on their own servers or clusters.

What is good

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

What to know first

  • Cloud is in private beta and requires an access request
  • Free plan allows up to three sandboxes
  • Free plan has no overage rates

Verdict

microsandbox offers a local-first microVM runtime with separate kernels and configurable network egress for untrusted workloads. The free plan has tight sandbox and resource limits; paid plans start at 49.00 USD per month, while cloud access is in private beta.

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
Yes
Paid from
$49/mo
Concurrent environments
1,000 environments
Persistent storage
Yes
Network controls
Yes
API or CLI access
Yes
Deployment
both

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