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Sandboxer vs Sealos DevBox

Sealos DevBox is a managed cloud dev environment on Kubernetes, reached from VS Code, Cursor or JetBrains, with public preview URLs and versioned OCI releases. Sealos sells fixed monthly packages from about $7 to $128. Pick DevBox for deploying projects on Sealos Kubernetes; pick Sandboxer for full VMs with their own kernel.

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

At a glance

Sandboxer and Sealos DevBox compared
CapabilitySandboxerSealos DevBox
IsolationmicroVM
Cloud Hypervisor, its own kernel
Kubernetes-based (isolation not stated)
Docs say DevBox is built on Kubernetes; they do not say whether workspaces are containers or VMs.
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
partial
Releases are versioned OCI images that can be deployed or rolled back.
HTTPS URL per port
Private with a token, or public
Dev server previewable through a public URL.
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
fixed monthly packages
Starter $7 new users (regular $34), Hobby 4 vCPU/4Gi $25 new users (regular $70), Standard $128.
GPUs
Self-host or open source
RegionsUS East (Virginia) and EU Central (Finland)

= not documented publicly.

Where Sealos DevBox is strong

  • Fixed monthly cost.
  • Connect from Cursor, VS Code or JetBrains.
  • Versioned OCI releases and rollback.
  • 7-day free trial without a card.

Where Sandboxer differs

  • DevBox runs on Kubernetes; Sandboxer VMs have their own kernel.
  • DevBox packages are monthly; Sandboxer is per second.
  • Root, Docker and nested KVM are not documented in pages found.

Pick Sealos DevBox if

  • You want to deploy to Sealos from the dev environment.
  • You prefer predictable monthly packages.

Pick Sandboxer if

  • You need a full Ubuntu 24.04 VM with root, systemd, Docker and nested KVM, with agents like Claude Code and Codex preinstalled.
  • You want stop to save memory and disk and resume to bring processes back, with stopped sandboxes costing nothing.
  • You want a REST API, CLI, TypeScript and Python SDKs, and an MCP server on per-second billing.

Sources

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 If something here is out of date, email hello@sandboxer.com and we'll fix it.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

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