Sandboxer vs OmniRun

OmniRun is an open-source sandbox cloud where each short-lived sandbox is a Firecracker microVM with its own kernel, restored from template memory snapshots in about a second. You can self-host it on one Linux box or use its EU managed service. Pick OmniRun for open-source, self-hosted, short-lived code execution; pick Sandboxer for long-lived full Ubuntu VMs with root, Docker, SSH and fork.

Checked against OmniRun's public docs on October 24, 2026. Sources are linked in the table and listed below.

At a glance

Sandboxer and OmniRun compared
Capability	Sandboxer	OmniRun
Isolation	microVM Cloud Hypervisor, its own kernel	Firecracker microVM under KVM, own kernel Site states 'not a container'.
Full Linux with root	Ubuntu 24.04, sudo, systemd	Not stated on the official pages checked.
Docker inside	Preinstalled	Not stated on the official pages checked.
Nested virtualization (/dev/kvm)		Not stated on the official pages checked.
Pause and resume with memory	Running processes come back	partial Sandboxes can be paused in memory; a paused sandbox does not survive a restart (no hibernate to disk).
Fork a sandbox	Copy-on-write disk copy that boots fresh	The compare page lists no fork or user snapshots.
HTTPS URL per port	Private with a token, or public	Public HTTPS preview URLs are supported.
Longest session	No limit on paid plans Auto-stop is up to 30 days or off	configurable timeout (example 300 s) Sandboxes are short-lived; limits section not read.
Billing	Per second, flat rate per size Stopped sandboxes are free	managed service pricing agreed per customer; self-host free No public price list.
GPUs		No GPU support because Firecracker has no GPU passthrough.
Self-host or open source		Apache-2.0; runs on one bare-metal Linux box with SQLite.
Regions	US East (Virginia) and EU Central (Finland)	EU (Finland) for managed service

= not documented publicly.

Where OmniRun is strong

Open source (Apache-2.0) and self-hostable on a single Linux machine.
Firecracker microVM isolation with network off by default.
Sub-second start from template memory snapshots.
Self-hosted worker backend for Claude Managed Agents and a desktop/computer-use option.

Where Sandboxer differs

OmniRun sandboxes are short-lived and fixed-size per template; Sandboxer VMs are long-lived with chosen sizes.
OmniRun lists no SSH, no fork, no user snapshots and no MCP server yet.
OmniRun's managed service has no public pricing; Sandboxer publishes hourly rates.
OmniRun roots, Docker and nested KVM are not stated.

Pick OmniRun if

You need an open-source sandbox you can self-host on your own hardware.
You want EU-hosted managed sandboxes (Finland).
Your workload is short-lived code execution and CI jobs rather than long-lived dev machines.

Pick Sandboxer if

Sandboxer gives each sandbox a full Ubuntu 24.04 VM with root, systemd and Docker preinstalled.
Sandboxer stop/resume keeps memory and running processes.
Sandboxer exposes any port as an HTTPS URL and bundles Claude Code, Codex and other coding agents.

Sources

Products change. If something here is out of date, email hello@sandboxer.com and we'll fix it. OmniRun is a trademark of its owner. Sandboxer is an independent product and is not affiliated with OmniRun.

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