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Published artifacts with a Grain watermarkStart with a shared workspaceAny agent, no token markupSource files stay with the workspace
The open source ChatGPT Space alternative for every agent.
Claude Code, Codex, Cursor or any CLI agent or MCP client publishes pages, wikis and apps to one shared workspace. Your team opens them. You keep the files.
Any OS:Connect any AI tool →
Open source · AGPL-3.0
you › Publish this as an internal app.
THE WORKSPACE
One workspace. Every agent.
Made withClaude CodeCodexCursorGemini CLI
2 minutes agoAvery LeeArtifactSep 20, 2026
1 hour agoJordan ParkWikiSep 12, 2026
YesterdayPriya ShahAppSep 15, 2026
4 days ago2 items
6 days ago2 items
9 days ago2 items
Grain vs ChatGPT Space
What Space does for ChatGPT, Grain does for every agent.
Share with your teamPublic, password or invite-only links, with comments your agent reads and acts on.How sharing works →Your work as filesCheck out, version, restore and export every artifact with the grain CLI.CLI reference →Apps, not just pagesGive an artifact Postgres, logins and scheduled jobs at the same URL.Internal tools →
✓Supported×Not built in◐Qualified support?Not documented
| Feature | Grain | ChatGPT Spacelaunched Sept 29, 2026 |
|---|---|---|
| Open source | Supported: AGPL-3.0 on GitHub | Not built in: Closed source |
| Choice of publishing agent | Supported: Any CLI agent or MCP client | Not built in: OpenAI agents only |
| Your own backend code | Supported: App workspace runtime | Not built in: Pages only; apps go to Sites |
| Built-in saved app data | Supported: App database | Not documented: Not documented¹ |
| Version history | Supported: Workspace revisions | Not documented: Not documented¹ |
| Built-in comments | Supported: Comments agents act on | Supported: Inline comments |
| Your work as files | Supported: Checkout, pull, restore | Not documented: Full export not documented¹ |
| Plans | Supported: Free tier, no card | Qualified support: Pro, Business, Enterprise |
¹ Not documented in the sources reviewed; not a claim of impossibility. See the full comparison or Grain against other tools.
Sources & scope · checked September 29, 2026
Built-in product features, excluding external integrations. Capabilities vary by plan and may change. ChatGPT Space requires a Pro, Business or Enterprise plan; ChatGPT Sites is a separate OpenAI product for hosted apps.
Pricing
Publishing is free.
You pay to drop the watermark and keep more of the workspace awake.
$65 / user / mo
No watermarkMore sandboxes, more running at onceTeam seats and shared spacesCustom domains
Talk to us
Deployment options for your teamSupport for your organizationSupport from the people who build it
You already pay for your agent. We never mark up tokens.
PLUG & PLAY
Grain works where
your agents live.
- ConnectThe desktop app, or the hosted MCP server from any computer.
- BuildAsk your agent for a page or an app.
- ShareGet a link your team can open.
# First: Grain desktop → Settings → Integrations → Grain CLI
❯ grain login
✓ Signed in — the bundled CLI is ready
❯ grain init --template html --name "First artifact"
✓ Workspace created — agent configuration written
Open Claude Code, Codex, or Cursor in this folder. After editing, push and checkpoint before sharing.
# Ask Claude Code or Codex
YOU → CLAUDE CODE / CODEX · Grain connected
›
Create an interactive renewal model as a Grain artifact. Let finance adjust retention and see the revenue impact.
✓ Read the workspace files
✓ Build the model and assumptions slider
✓ Prepare the preview
✓ grain push → grain checkpoint
renewal-model.htmlAn idea finance can actually try.
+1 file01 / INSTALL & CONNECT GRAIN
Internal apps
The tools your team shapes for itself.
Built by your agent, kept by Grain.
Rich artifacts and small, live tools that fit the exact work in front of you.
Quote generator
Straight after the sales call, a quote in the house style, from a form the whole team uses.
app · formPricing migration sheet
Live formulas and filters, at a link your finance team can open.
spreadsheet · sharedROI deck for a CFO
A presentation with knobs. Drag the assumptions and the return recalculates in front of them.
deck · interactiveInteractive whiteboard
A canvas the team draws on, in the same workspace as the deck it explains.
canvas · liveDeck with the prototype inside
The working mockup runs on slide four. Nobody asks to see it later.
deck · embedded appAgreement
Terms as a page with a real URL. Comments in place, versions kept.
document · versionedBuilt by a small team.
Used to run real ones.
Dcouple AI and the BloomText team run their businesses on Grain. The proof is in the artifacts: pricing migrations, quote generators, interactive decks, whiteboards and PR walkthroughs.
Questions
What do people ask about Grain?
Do I need a Grain subscription for the agent?
No. Bring Claude Code, Codex or Cursor on your own plan. Your local agent does the work, so there are no API credits to buy.
Who can open what I publish?
Share a public link or protect it with a password. The person opening it does not need your coding agent. Grain organization membership is separate.
How is Grain different from ChatGPT Space?
ChatGPT Space is OpenAI’s shared workspace of pages that people and ChatGPT edit together, on Pro, Business and Enterprise plans. Grain gives a shared home to any agent, keeps every artifact as files you can check out and export, and runs apps with their own database. See the full comparison.
Is Grain open source?
Yes. The source is on GitHub under AGPL-3.0, with two attribution terms.
Which agents work?
Claude Code, Codex and Cursor out of the box, and anything else that speaks MCP.
Who builds Grain?
Tyler Brown and Parsa Khazaeepoul at Dcouple, who also built the open source agent workbench Pane. Dcouple runs its own work on Grain. About Grain.
Windows and Linux?
Yes. The desktop app runs on macOS, Windows and Linux. Install it with curl -fsSL https://rungrain.com/install.sh | sh on macOS or Linux, or irm https://rungrain.com/install.ps1 | iex in Windows PowerShell. From any computer, you can also connect Claude, ChatGPT or any MCP client to the hosted MCP server and work with the same grains.
Two of us build Grain, and we run Dcouple on it, as does the BloomText team. We made Pane first—an open-source agent workbench—and kept hearing the same question: where does the work go when the laptop closes, or when you switch agents?
Tyler + Parsa