Sandboxer vs Together Code Sandbox

Together Code Sandbox starts each sandbox from a snapshot built from a Docker image or Dockerfile, with sizes from 0.1 to 16 vCPU and per-hour CPU and RAM pricing. Access is enabled per organization. Pick it if you already build on Together AI models and GPUs; pick Sandboxer for a full Ubuntu VM with root, Docker and nested KVM.

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

At a glance

Sandboxer and Together Code Sandbox compared
Capability	Sandboxer	Together Code Sandbox
Isolation	microVM Cloud Hypervisor, its own kernel	isolated runtime (type not stated) Docs say only isolated runtime environments.
Full Linux with root	Ubuntu 24.04, sudo, systemd
Docker inside	Preinstalled	partial Snapshots are built from a Docker image or Dockerfile; running Docker inside a sandbox is not stated.
Nested virtualization (/dev/kvm)
Pause and resume with memory	Running processes come back	partial Marketing page says hibernation snapshots disk and memory with about 500 ms resume; docs say state is kept by snapshotting the filesystem on termination and a terminated sandbox cannot restart.
Fork a sandbox	Copy-on-write disk copy that boots fresh	partial Create a new sandbox from a snapshot to continue earlier state; not called fork.
HTTPS URL per port	Private with a token, or public	Live preview URLs per port, e.g. https://<id>-3000.csb.app; access policy not stated.
Longest session	No limit on paid plans Auto-stop is up to 30 days or off	no maximum stated Runs until terminated unless ttl is set at creation.
Billing	Per second, flat rate per size Stopped sandboxes are free	per hour: vCPU and GiB RAM $0.0446 per vCPU-hour, $0.0149 per GiB-hour; shared filesystem $0.16/GiB-month.
GPUs
Self-host or open source
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

Together Code Sandbox

$0.30/hour

4 vCPU × $0.0446/vCPU-h + 8 GiB × $0.0149/GiB-h

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

Where Together Code Sandbox is strong

Sizes from 0.1 to 16 vCPU with 1 to 8 GB RAM per CPU.
Environments defined as Docker image or Dockerfile snapshots built by Together's remote builder.
Sits next to Together AI's models and GPU clusters.
Published per-vCPU and per-GiB list prices.

Where Sandboxer differs

Together documents sandboxes as ephemeral by default, with state saved by snapshotting the filesystem on termination; Sandboxer stop saves memory and disk.
Access requires enablement for your organization; Sandboxer signs up with a trial.
Together lists default sizing of 1 vCPU / 2 GiB; Sandboxer's default is 4 vCPU / 8 GB / 50 GB.
Root, Docker-in-VM and nested virtualization are not documented for Together Code Sandbox.

Pick Together Code Sandbox if

You build on Together AI models and want sandboxes under the same account.
You want fine-grained sizing from 0.1 vCPU up.
You want to define environments directly from a Dockerfile.

Pick Sandboxer if

You need a persistent full VM with root, systemd, Docker and nested KVM.
You want stop/resume that returns running processes.
You want coding agents preinstalled and self-serve signup.

Sources

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

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