Sandboxer vs GitHub Actions hosted runners

GitHub-hosted runners are fresh virtual machines that run a single Actions job and are then discarded; larger and GPU runners need Team or Enterprise Cloud. Sandboxer is not a CI service: sandboxes persist and can pause with memory saved. Pick GitHub Actions for workflows tied to your repositories; pick Sandboxer for long-lived agent and dev environments.

Checked against GitHub Actions hosted runners' public docs on October 27, 2026. Sources are linked in the table and listed below.

At a glance

Sandboxer and GitHub Actions hosted runners compared
Capability	Sandboxer	GitHub Actions hosted runners
Isolation	microVM Cloud Hypervisor, its own kernel	fresh VM per job Each standard runner is a new VM per job; single-CPU ubuntu-slim runners use an unprivileged container.
Full Linux with root	Ubuntu 24.04, sudo, systemd	Passwordless sudo on Linux VMs; ubuntu-slim is unprivileged.
Docker inside	Preinstalled	Ubuntu 24.04 image includes Docker 28; ubuntu-slim does not support Docker-in-Docker.
Nested virtualization (/dev/kvm)
Pause and resume with memory	Running processes come back	Not offered: CI machines are ephemeral and exist only for the length of a job.
Fork a sandbox	Copy-on-write disk copy that boots fresh	Not offered: CI machines are ephemeral and exist only for the length of a job.
HTTPS URL per port	Private with a token, or public	The hosted-runner docs don't describe inbound public endpoints.
Longest session	No limit on paid plans Auto-stop is up to 30 days or off	6 h per job Cannot be increased by support.
Billing	Per second, flat rate per size Stopped sandboxes are free	per minute, rounded up per job Linux 2-core $0.006/min; larger runners billed per minute only while used.
GPUs		partial GPU larger runners; larger runners require the Team or Enterprise Cloud plan.
Self-host or open source		partial Self-hosted runners supported; the control plane is GitHub.
Regions	US East (Virginia) and EU Central (Finland)

= not documented publicly.

Price for one 4 vCPU, 8 GB machine

Sandboxer

$0.036/hour

Flat per-second rate for the default size

GitHub Actions hosted runners

$0.72/hour

Linux 4-core x64 larger runner × $0.012/min × 60 (Team/Enterprise Cloud only; RAM not stated on the pricing page)

List prices from each provider's pricing page, before free credits, plans and storage. This compares price only.

Where GitHub Actions hosted runners is strong

Tight integration with GitHub repositories, with no setup for standard runners.
Linux, Windows and macOS runners, including Arm and GPU larger runners.
Docker preinstalled on the Ubuntu image and passwordless sudo.
Larger runners offer static IPs.

Where Sandboxer differs

Each job is capped at 6 hours and the VM is discarded; Sandboxer sandboxes can run with no time limit on a paid plan.
Hosted runners bill per minute rounded up per job; Sandboxer bills per second and stopped sandboxes cost nothing.
GitHub offers macOS, Windows and GPU runners; Sandboxer does not.

Pick GitHub Actions hosted runners if

Your code and CI already live in GitHub.
You need macOS, Windows or GPU runners.
You want CI billed through your existing GitHub account with no separate vendor.

Pick Sandboxer if

Need a long-lived machine you can stop, resume and reach over SSH or an HTTPS URL, not a machine that exists for one job.
Want coding agents preinstalled and a prompt API, MCP server, SDKs and CLI for driving them.
Need Docker, nested KVM and full root in a VM that can stop with memory saved and resume with processes running.

Sources

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

Other comparisons

Sandboxer vs E2B

Firecracker microVMs with memory-preserving pause and fork, and an open-source stack.

Compare

Sandboxer vs Daytona

Many sandbox classes, from containers to VMs, Windows and GPUs.

Compare

Sandboxer vs Modal

Massive scale and GPUs for short-lived sandboxes, gVisor by default.

Compare

Sandboxer vs Vercel Sandbox

Firecracker microVMs billed on active CPU, inside the Vercel platform.

Compare

All 169 comparisons