subspace
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Parallel work.
Zero amnesia.

The free, agent-first workspace for product builders. Run every feature, fix and experiment in its own Topic, with your agents, docs, browser, terminals and Git, and a Shared Memory each new session starts from.

Download for Mac · Free Windows? Get notified

Bring your own Claude Code, Codex or API keys. Providers bill you directly.
Works with Claude CodeCodexOpenCodeGeminiCursorCopilotAmpFactory DroidOpenClawKiro

One Topic for each piece of work.

A Topic is a workspace with its own branch, agents, docs, browser and terminals. Run as many as you like, side by side.

  • Like channels for your work. Each Topic keeps its own agents, docs, files, browser tabs and terminals together.

  • Make one for anything, however long it runs. A one-day fix, a few weeks of research, or a site that’s never finished. Each runs in its own Git worktree.

  • One Topic, many Threads. Each Thread is an agent session in its own tab, titled once the agent knows what it’s working on.

Every Topic remembers.

Decisions, progress, blockers and open questions are saved to the Topic's Shared Memory as you work. Start a new session tomorrow, or switch from Claude Code to Codex, and it picks up where the last one stopped.

Built in, with no memory skill or plugin to install. Agents run locally. After each turn, Subspace summarizes what happened into short observations, processed through OpenAI by default. Turn Memory off for a Topic or everywhere, or use your own OpenRouter or OpenAI key.

Do more in parallel. Ship it back together.

Every Topic is its own Git worktree, so features, fixes and experiments never collide. When one is ready, the Ship Loop takes it from changes to a drafted commit, a pull request and a merge in a few clicks. Then the Topic carries on.

Everything the work needs, in one window.

Agents, docs, files, browser, terminals and Git sit side by side in split panes, all scoped to the Topic. No more hunting across apps for where the work went.

Any model. Your Claude Code setup.

Switch Claude Code to OpenRouter, Z.ai and Meta models, or to OpenAI models with your ChatGPT sign-in (beta), in the same session and with your skills, MCPs and settings intact. Codex and other CLI agents run too.

Find or launch anything with ⌘ K

Files, docs, websites, terminal commands, Topics and agents, from one box, wherever you are.

Autocomplete that knows your project.

Type @, / or # to pull in files, docs, skills, shell commands, MCP servers, subagents and Topics: in agent chat, in comments, and in terminals with //.

Point at the work. The context comes with it.

Comment on an agent's reply, a line in a doc or file, terminal output, or an element in the browser. Every comment links back to its source, and your agent gets them all as one review.

Free. The whole workspace.

Everything on this page is included. Bring the agent subscriptions or API keys you already have.

Provider usage is billed by your provider. Subspace doesn't resell it.

Download for Mac · Free

Still deciding? Ask an AI you trust whether Subspace fits the way you build. It gets a balanced prompt.

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Questions

What’s actually free?
The whole Subspace product: Agent Chat, supported CLI agents, Topics, Shared Memory, docs, files, browser, comments, HTML Artifacts, terminals, Git, and the Ship Loop. Subspace is free. Bring your own provider subscription or API access; any model or agent usage is billed separately by that provider.
Can I use my existing Claude Code or Codex subscription?
Yes. Subspace is designed to work with the provider access you already have. Sign in to supported agent CLIs as you normally would, then run them inside the workspace. Subspace itself is free; your provider continues to handle any subscription or usage charges.
Which models can I use?
Inside Claude Code you can switch between its native models and OpenRouter, Z.ai and Meta models, or OpenAI models with your ChatGPT sign-in (beta), in the same session and with your skills, MCPs and settings intact. Codex, Gemini, OpenCode and other supported CLI agents run with their own models. Your provider bills any usage directly.
What is a Topic?
A Topic is the durable home for one body of work. Create one instantly with Cmd+N, name it, and go. Every Topic is a Git worktree under the hood, so you can build features, fix bugs, do research, and create prototypes in parallel without conflicts. Its agent sessions, Shared Memory, docs, files, browser, comments, artifacts, terminals, and Git state all stay together.
Why use Subspace instead of talking to an agent directly?
A direct agent session is useful, but the surrounding work quickly spreads across dedicated agent apps, terminals, editors, browsers, notes, and Git tools. Subspace gives that entire workflow one home. Use Agent Chat or supported CLI agents, keep every working surface with its Topic, collaborate through source-linked comments and HTML Artifacts, and carry useful context between agents, models, and sessions with Shared Memory. You still choose the agent and approve the work; Subspace keeps everything around it legible.
Is my code sent to your servers?
Subspace does not upload your codebase to our servers. Your agents run locally in your terminal. To build Memory, Subspace summarizes each turn into short observations, processed through OpenAI by default. You can turn Memory off for a Topic or everywhere, or use your own OpenRouter or OpenAI API key for that processing.
What does Shared Memory remember?
Shared Memory captures useful context about the work: progress, decisions, blockers, and what remains open. It belongs to the Topic rather than one chat window, agent, or model, so every new session can continue from the same project context. It is built in—there is no separate memory skill or plugin to install and remember to invoke. You and the agent can search what Subspace remembers whenever you need to recover a past decision or its surrounding context.
Does it work with my existing setup?
Yes. Subspace runs supported CLI agents in real terminals, so you can keep using the provider access and agent configuration you already have.
When does Windows ship?
Windows is in active development — codename ballmer. The Mac app is shipping today; the Windows build is the next major platform on the roadmap. Get on the list and we’ll email you the day the beta opens.

Start your first Topic.

Download for Mac · Free

macOS today · Windows waitlist