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Sandboxer vs Opensteer

Opensteer offers specialized AI agents that browse the web and run on schedules, plus an MIT-licensed runtime that gives coding agents control of a local or Opensteer Cloud browser. It centers on browser automation, while Sandboxer gives agents a full Ubuntu VM with root, Docker and nested KVM. Pick Opensteer for scheduled browsing agents or driving a real browser; pick Sandboxer when the agent needs a whole Linux machine.

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

At a glance

Sandboxer and Opensteer compared
CapabilitySandboxerOpensteer
IsolationmicroVM
Cloud Hypervisor, its own kernel
browser instance
Controls a local Chrome/Edge or an Opensteer Cloud browser; the separately priced 'computer runtime' is not described
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
Named browser sessions and cloud browser profiles can be reused
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
BillingPer second, flat rate per size
Stopped sandboxes are free
monthly plan with platform credits; browser and computer runtime $0.20/h each; models at API pricing
Free, $50, $200 and Enterprise plans
GPUs
Self-host or open sourcepartial
Browser-control runtime is open source (MIT) and runs locally; Opensteer Cloud is hosted
RegionsUS East (Virginia) and EU Central (Finland)

= not documented publicly.

Where Opensteer is strong

  • The browser-control runtime is open source under MIT and works with a local Chrome or Edge profile.
  • Agents can run on schedules in the cloud or on your own machine.
  • Simple runtime pricing of $0.20/h for browsers and computers, and your own Claude or ChatGPT subscription can be used for free.
  • Works with Codex, Claude Code and Cursor through installable skills.

Where Sandboxer differs

  • Opensteer focuses on browsing agents and browser control; Sandboxer provides a full Ubuntu VM with root, Docker and nested KVM.
  • Opensteer's runtime can drive your own local browser; Sandboxer is hosted only.
  • Sandboxer documents memory-preserving pause, fork and any port as an HTTPS URL; Opensteer's pages do not describe these.

Pick Opensteer if

  • You want ready-made agents that browse the web on a schedule.
  • You want an open-source tool to let a coding agent drive your own logged-in browser.

Pick Sandboxer if

  • Your agent needs a full Linux machine to build, run and serve code.
  • You need Docker, nested KVM or any port exposed as an HTTPS URL.
  • You want to pause and resume a workspace with its processes.

Sources

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

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