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Sandboxer vs Koyeb Sandboxes

Koyeb offers Sandboxes as ephemeral compute for isolated code execution inside its broader serverless platform, available on Starter, Pro and Scale plans. It differs from Sandboxer by being one feature of an app platform with GPUs and multiple regions. Pick Koyeb if you already run on its platform or need GPUs; pick Sandboxer for persistent full VMs.

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

At a glance

Sandboxer and Koyeb Sandboxes compared
CapabilitySandboxerKoyeb Sandboxes
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
Fork a sandbox
Copy-on-write disk copy that boots fresh
HTTPS URL per port
Private with a token, or public
partial
SDK can expose and unexpose internal ports; TCP proxy mentioned.
Longest sessionNo limit on paid plans
Auto-stop is up to 30 days or off
BillingPer second, flat rate per size
Stopped sandboxes are free
per second (platform serverless)
No sandbox-specific rates found on pricing page.
GPUspartial
Koyeb offers GPU serverless instances; availability for sandboxes not stated.
Self-host or open source
RegionsUS East (Virginia) and EU Central (Finland)7 regions on Pro/Scale for serverless compute
Platform-level, sandbox availability not stated.

= not documented publicly.

Where Koyeb Sandboxes is strong

  • Sandboxes sit alongside a full serverless platform.
  • GPU instances available on the platform.
  • Per-second billing and multiple regions.

Where Sandboxer differs

  • Koyeb sandboxes are described as ephemeral; Sandboxer sandboxes can stop and resume with memory.
  • Koyeb's sandbox pages do not state root, Docker, nested virtualization or snapshots.
  • Koyeb Sandboxes are available on the Starter, Pro and Scale plans of the Koyeb platform.

Pick Koyeb Sandboxes if

  • You need GPUs or serverless services next to your sandboxes.
  • You want a choice of multiple regions.
  • You already deploy on Koyeb.

Pick Sandboxer if

  • Your workload needs a full Ubuntu VM with systemd, Docker preinstalled and nested KVM.
  • You want coding agents (Claude Code, Codex, OpenCode, Pi, Kimi Code, Mistral Vibe) preinstalled and driven through a prompt API.
  • You want stop/resume that keeps memory and running processes, with sessions that can run with no time limit on a paid plan.

Sources

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 If something here is out of date, email hello@sandboxer.com and we'll fix it.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

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