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Sandboxer vs netcup (VPS / root server)

netcup rents KVM-based VPS and root servers on monthly or longer contracts. Its documentation says nested virtualization is disabled on its systems. Sandboxer is billed per second, stops for free and exposes /dev/kvm. Pick netcup for cheap always-on servers in Europe or Manassas; pick Sandboxer for on-demand agent sandboxes.

Checked against netcup (VPS / root server)'s public docs on October 24, 2026. Sources are linked in the table and listed below.

At a glance

Sandboxer and netcup (VPS / root server) compared
CapabilitySandboxernetcup (VPS / root server)
IsolationmicroVM
Cloud Hypervisor, its own kernel
KVM virtual machine (VPS)
netcup states KVM virtualization on its servers.
Full Linux with root
Ubuntu 24.04, sudo, systemd
Docker inside
Preinstalled
Nested virtualization (/dev/kvm)
The wiki says the SVM flag is switched off and cannot be activated for security and stability.
Pause and resume with memory
Running processes come back
Fork a sandbox
Copy-on-write disk copy that boots fresh
HTTPS URL per port
Private with a token, or public
Longest sessionNo limit on paid plans
Auto-stop is up to 30 days or off
not applicable: persistent server for the contract term
BillingPer second, flat rate per size
Stopped sandboxes are free
monthly; minimum terms 1, 12 or 24 months
12 months saves 13%, 24 months 26% versus monthly.
GPUs
Self-host or open source
RegionsUS East (Virginia) and EU Central (Finland)Vienna, Nuremberg, Amsterdam, Manassas (USA), Singapore
Location cannot be changed after setup.

= not documented publicly.

Where netcup (VPS / root server) is strong

  • Low monthly prices: VPS 1000 G12.5 (4 vCore, 8 GB, 128 GB SSD) lists at EUR 14.50 per month on 12 months. (page does not make clear whether this is net or incl. VAT)
  • Five locations in Europe, the US and Singapore.
  • Traffic is included.

Where Sandboxer differs

  • netcup is billed by contract term, while Sandboxer bills per second and costs nothing when stopped.
  • netcup disables nested virtualization; Sandboxer provides /dev/kvm.
  • netcup is a bare VPS; Sandboxer adds an agent API, fork and per-port HTTPS URLs.

Pick netcup (VPS / root server) if

  • You need always-on cheap servers in Europe with included traffic.
  • You want a long-term fixed monthly bill.
  • You need a root server with guaranteed resources.

Pick Sandboxer if

  • You want a sandbox that stops with memory and disk saved and resumes with processes running, with stopped sandboxes costing nothing.
  • You want Docker, systemd, nested KVM, SSH and coding agents (Claude Code, Codex and others) already installed, with HTTPS URLs for any port, without assembling it yourself.
  • You want a per-second-billed Ubuntu 24.04 VM driven by a REST API, CLI, MCP server or TypeScript/Python SDK.

Sources

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

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