Sandboxer vs Kamatera

Kamatera sells configurable KVM cloud servers (up to 104 vCPUs) with root access, hourly or monthly billing and over 20 data center locations. It is a general VPS host: powered-off servers still pay for storage and IP, and nested virtualization is not supported, while Sandboxer gives agents pausable VMs with nested KVM and per-port URLs. Pick Kamatera for long-running custom servers in many locations; pick Sandboxer for agent workspaces that start, pause and fork.

Checked against Kamatera's public docs on October 28, 2026. Sources are linked in the table and listed below.

At a glance

Sandboxer and Kamatera compared
Capability	Sandboxer	Kamatera
Isolation	microVM Cloud Hypervisor, its own kernel	full VM 'Our cloud servers are equipped with KVM virtualization'
Full Linux with root	Ubuntu 24.04, sudo, systemd	Full root access to the server
Docker inside	Preinstalled	'Kamatera cloud servers are fully Docker-ready'
Nested virtualization (/dev/kvm)		'We currently do not support nested virtualization on our cloud servers'
Pause and resume with memory	Running processes come back	Powered-off hourly servers still pay a small charge for storage and IP; no RAM-preserving pause documented
Fork a sandbox	Copy-on-write disk copy that boots fresh	partial You can clone an existing server and deploy it in the same or another data center
HTTPS URL per port	Private with a token, or public	Public IPs; IPv6 at $1/address/month; no per-port URLs
Longest session	No limit on paid plans Auto-stop is up to 30 days or off
Billing	Per second, flat rate per size Stopped sandboxes are free	hourly servers billed by the minute, or prepaid monthly Powered-off hourly servers pay a reduced storage+IP charge
GPUs		Not mentioned on the pages read
Self-host or open source
Regions	US East (Virginia) and EU Central (Finland)	20+ data centers in North America, Europe, Asia-Pacific and the Middle East The pricing page lists 21 locations

= not documented publicly.

Where Kamatera is strong

Servers are configurable by CPU type (A, B, T, D), up to 104 vCPUs, rather than fixed sizes.
Hourly servers are billed by the minute, and prepaid monthly servers carry no long-term commitment.
Over 20 locations including Tel Aviv, Milan, Bucharest and Tokyo.
Servers can be cloned to the same or another data center.

Where Sandboxer differs

Kamatera does not support nested virtualization; Sandboxer exposes /dev/kvm.
A powered-off Kamatera server still pays for storage and IP; a stopped Sandboxer sandbox costs nothing and resumes with its processes.
Kamatera has many locations; Sandboxer runs in us-east and eu-central.
Sandboxer ships coding agents, a prompt API and any port as an HTTPS URL; Kamatera is a plain VPS.

Pick Kamatera if

You want a long-running server with a custom CPU/RAM mix in a specific country.
You want monthly fixed pricing or Windows servers.

Pick Sandboxer if

You need nested KVM inside the VM.
You want sandboxes that pause with memory and cost nothing while stopped.
You want coding agents preinstalled with a prompt API and MCP server.

Sources

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

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