Comparison

Containarium vs GitHub Codespaces

Codespaces is a cloud IDE environment for people: it stops when you go idle and is deleted after a period of inactivity. Agents don't go idle the way people do. Containarium gives an agent a box that stays up, driven over MCP, on infrastructure you choose.

Choose Containarium when…

  • An agent, not a person, is the main user of the environment.
  • Work runs longer than an idle timeout, or overnight.
  • You want to self-host or use GPUs you own.
  • The environment should serve an app on a public hostname.

Choose GitHub Codespaces when…

  • Humans are the main users and want VS Code in the browser, one click from a repo.
  • Your team is standardized on devcontainer.json and GitHub.
  • You want the included free hours on personal accounts.
  • Environments should stop and clean up automatically.

An environment for an agent vs an environment for a developer.

Side-by-side

Dimension Containarium GitHub Codespaces
Built for Agents (MCP, SSH, CLI); humans via any SSH editor Developers in VS Code (browser or desktop) and JetBrains
Idle behavior Stays up; optional auto-sleep Stops after 30 min idle by default (configurable 5–240 min)
Retention Until you delete it Inactive codespaces deleted after 30 days by default
Agent interface MCP server in every box Terminal and editor; no built-in MCP server for the environment
Self-hosting Yes — Apache 2.0, one VM GitHub-hosted only
GPU NVIDIA passthrough on your hardware No GPU machine types in current pricing
Pricing OSS: your VM's cost. Cloud: free tier, then usage 2-core $0.18/hr … 32-core $2.88/hr; storage $0.07/GB-month; personal accounts get a free monthly quota

GitHub Codespaces details checked against its public docs and pricing pages in September 2026. Check GitHub Codespaces's own docs for current specifics.

Timeouts are built for people

Codespaces' defaults make sense for humans: stop after 30 minutes without input, delete after 30 days unused. An agent working through a long task list, or waiting on a slow build, trips those rules constantly.

A Containarium box has no idle clock unless you turn one on. It's a long-lived Linux machine with systemd, so an agent can leave a dev server or a queue worker running and find it there later — and publish it with containarium expose-port.

Driven by agents, not editors

Codespaces is organized around an editor session. Containarium is organized around an interface agents already speak: every box runs an MCP server with shell and file tools, reached over SSH. People still get in with any SSH-capable editor — see Cursor or Claude Code.

FAQ

Can I use GitHub Codespaces for AI coding agents?

Yes, for interactive work. The limits show up when the agent runs unattended: codespaces stop after 30 minutes of inactivity by default (at most 4 hours) and are deleted after 30 days unused. Containarium boxes stay up until you delete them.

What is the difference between Containarium and GitHub Codespaces?

Codespaces is a GitHub-hosted development environment designed around an editor. Containarium is an open-source runtime that gives each AI agent a persistent Linux box with an MCP server, self-hostable on your own VM.

Does Containarium support devcontainers or VS Code?

Any editor that works over SSH works with a box, including VS Code Remote-SSH, Cursor and JetBrains Gateway. Containarium does not read devcontainer.json.

An environment that doesn't time out on your agent.

Start free on the hosted cloud, or self-host the open source on your own VM.

Try Containarium Cloud How the agent sandbox works

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