Reads across tools
Twelve connectors. Ads, analytics, revenue and session replays, read together for one question. What each one reads
Free on the ChatGPT plan you already pay for
See the whole picture.
Fix it in the same moment.
Duct is the open-source AI marketing agent that reads every tool you run together, finds what needs to change, and changes it when you press Apply. No hunting through tools for the answer, no deciding on half of it.
Free · No account, no credit card · Windows and Linux too
What it does
Reads across. Acts with approval.
Remembers.
Acts, with your approval
It proposes the change, shows what it touches, and applies it only when you press Apply.
Remembers
Targets, decisions and what it learned, on a timeline you can correct.
Your keys, or your ChatGPT plan
Model keys stay in your keychain. Or sign in with ChatGPT and skip the key entirely.
AI marketing agent
Every AI marketing agent can read your ads.
Few can read them next to revenue.
An AI marketing agent should read every tool your growth runs on, name the cause with its sources, and change the thing, with a person in between. Three tests, and how Duct meets them.
Test one
It reads across, not one at a time
Ads, analytics and revenue in one question. "Why did signups drop last week" is a join across Google Ads, GA4 and Stripe, not a report from one of them.
Test two
It proposes, then waits
The change arrives as a preview with what it touches. Nothing is applied until you press Apply, and there is no approve tool in the model's list, so it cannot talk itself into one.
Test three
It keeps a record you can read
Every change lands in the activity log: who proposed it, who approved it, what was applied or rolled back. An agent that acts on your accounts owes you the receipt.
Weighing the alternatives? Compare Duct with Claude Cowork and n8n
What it's for
Three agents, three jobs.
Insights
- When
- Someone asks why signups dropped this week.
- Today
- A morning gone. The reply is still a guess.
- With Duct
- It reads Ads, GA4 and Stripe together and answers with the change it proposes.
SEO audit
- When
- A site needs a look.
- Today
- A paid tool, or a consultant.
- With Duct
- Paste a URL. No account. The fixes come back in priority order.
Content Studio
- When
- The week's posts are due.
- Today
- A plan in Notion and five upload boxes.
- With Duct
- Plan on a board, generate, publish to nine networks. The numbers come back to the card.
Coming next
Ads audit
Sales & RevOps
E-commerce & DTC
Customer Success
FAQ
Five honest answers
What is Duct?
Duct AI is an open-source AI marketing agent. It connects your product, marketing and revenue tools, answers questions across them, proposes changes and applies them when you approve. It runs as a desktop app on macOS, Windows and Linux.
Is it free?
Yes. The core is MIT licensed and stays that way. You pay your model provider directly, or sign in with the ChatGPT plan you already have. A hosted team plan comes later; the core stays open.
Does it change my accounts without asking?
No. Reporting works with read-only access. A change is proposed with what it touches, and applied only when you press Apply. There is no approve tool in the list the model can call, so it cannot be talked into applying anything. Destructive changes are flagged; anything over a guardrail is blocked until you look. The doctrine page links the file that enforces it.
Which tools does it connect to?
Google Ads, Meta Ads, Apple Search Ads, OpenAI Ads, GA4, Search Console, Tag Manager, Mixpanel, Microsoft Clarity, GrowthBook, Stripe and RevenueCat, with HubSpot next. The four Google tools connect with OAuth; the rest take a key you paste once. Nothing is exported by hand.
Where do my keys and data live?
Model keys stay in your operating system's keychain and travel with a request only while a job runs. Connector authorisations are stored encrypted by the hosted API. The desktop app is a thin shell over that API; a self-host build runs everything on your own machine. Why it's called Duct is on the about page.