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Sandboxer vs Cube Computer

Cube Computer is one persistent cloud Linux machine per user, reached from a Mac app, browser or phone, with Claude Code, Codex and OpenCode installed and 18 more agents a click away. Sandboxer offers many VMs through an API and SDKs, with pause that keeps running processes, copy-on-write forks and public HTTPS URLs per port. Individuals wanting a single always-on agent box with a desktop app fit Cube; teams running sandboxes programmatically fit Sandboxer.

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

At a glance

Sandboxer and Cube Computer compared
CapabilitySandboxerCube Computer
IsolationmicroVM
Cloud Hypervisor, its own kernel
Full Linux with root
Ubuntu 24.04, sudo, systemd
Docker inside
Preinstalled
Nested virtualization (/dev/kvm)
Pause and resume with memory
Running processes come back
Pausing stops running processes; files are kept and only storage is charged.
Fork a sandbox
Copy-on-write disk copy that boots fresh
The machine page offers backups and reset, not cloning or forking.
HTTPS URL per port
Private with a token, or public
Ports are forwarded to localhost on your Mac via the desktop app only; reachable from that Mac only.
Longest sessionNo limit on paid plans
Auto-stop is up to 30 days or off
no limit
The machine runs until you pause it or credit runs out.
BillingPer second, flat rate per size
Stopped sandboxes are free
per minute, CPU + memory, plus storage
Compute is metered by the minute while running; storage is charged while running or paused; prepaid credit, no subscription.
GPUs
Self-host or open source
RegionsUS East (Virginia) and EU Central (Finland)

= not documented publicly.

Price for one 4 vCPU, 8 GB machine

Sandboxer
$0.036/hour
Flat per-second rate for the default size
Cube Computer
$0.036/hour
(4 CPU × $3 + 8 GB × $1.50 + 50 GB × $0.05) per month = $26.50 / 730 h; compute alone is $24/730 = $0.0329/h

List prices from each provider's pricing page, before free credits, plans and storage. This compares price only.

Where Cube Computer is strong

  • One persistent machine keeps repos, terminals and running agents between sessions and when your laptop is closed.
  • Claude Code, Codex and OpenCode come installed, with 18 more terminal agents installable in one click.
  • Usable from a Mac app, any browser and a phone, with SSH set up automatically for editors and the Claude and Codex apps.
  • Simple prepaid credit with $25 free to start and no card required.

Where Sandboxer differs

  • Cube is one personal machine driven from its app; Sandboxer runs many sandboxes through a REST API, CLI and SDKs.
  • Pausing a Cube stops running processes; pausing a Sandboxer sandbox saves memory so processes resume.
  • Cube forwards ports to localhost on your Mac; Sandboxer exposes any port as an HTTPS URL, private or public.
  • Cube charges for storage while paused; stopped Sandboxer sandboxes cost nothing.

Pick Cube Computer if

  • You want a single always-on cloud machine for your own agents, managed from a Mac app or phone.
  • You prefer prepaid credit without a monthly plan or card up front.
  • You want a Market of installable apps (kanban boards, agent workspaces) on your machine.

Pick Sandboxer if

  • You need many sandboxes created and controlled through an API, SDKs or MCP.
  • You want pause/resume that brings running processes back, and copy-on-write forks.
  • You need public HTTPS URLs per port, Docker preinstalled or nested KVM.

Sources

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

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