Duct

See the whole picture. Fix it in the same moment.

Duct is an open-source AI marketing agent for product and growth teams. It connects Google Ads, GA4, Search Console, Mixpanel, Stripe and seven more, reads across all of them at once, remembers what it learns about your business, and, with your approval, changes things in those tools for you. The approve tool does not exist in the list the model can call; you press the button.

⬇️ Download the desktop app and Duct runs the service for you; your model keys never leave your machine. Prefer to run every part of it yourself? Self-host it. Same code, MIT either way.

Free during beta · No credit card · About 10 minutes to connect your tools

🤖 Three agents, more on the way

📊 Insights. Ask "why did signups drop last week" and get an answer that reads Google Ads, GA4 and Stripe together, not one at a time. The kind of thing it finds: ROAS up 14%, but Android 7-day retention down 2.4×. You are paying to acquire churners. It pauses to ask when it needs a decision, a verification sub-agent re-checks every number before it reaches you, and the brief it writes is saved, versioned and cites its sources.

🌱 SEO audit. Paste a URL and Duct crawls the site, reads the technical and content signals, and hands back a prioritised report. This is the free front door at getduct.ai: no account needed to run one.

🎬 Content Studio. A plan on a board, a post per card, slides and images generated for each one, and one click to publish to TikTok, Instagram, LinkedIn, YouTube, Threads, X, Facebook, Pinterest and Bluesky. Results come back onto the card, so the next plan learns from the last one.

Who it is for today: PMs and growth teams, SEO and content teams, and performance marketers chasing attribution gaps, budget shifts and creative fatigue.

🚧 Coming next: Sales & RevOps (pipeline risk and conversion signals from CRM, calls and product usage), E-commerce & DTC (LTV-versus-ROAS blind spots across Meta Ads, Stripe and RevenueCat), and Customer Success (at-risk accounts from NPS, usage and support signals). Follow along in Issues and at getduct.ai.

🧩 For your coding agent

Ask Claude Code, Codex or Cursor "is my site ready to launch?" and it reads your live pages and the repository behind them, checks what the page promises against what the code does, scores the launch out of 100 and gives you three ranked fixes, each as a diff it applies only when you say yes. No Duct account, nothing sent to us.

npx skills add 5hirish/duct

🔑 Use your ChatGPT subscription

Sign in with your own ChatGPT plan in the desktop app and Duct runs on it. No API key, no second bill. Or bring keys for Anthropic, OpenAI, Gemini, xAI or anything on OpenRouter, and assign three tiers, Heavy, Standard and Light, so deep analysis and cheap summaries do not pay the same price. Hit a rate limit and Duct steps down a tier instead of stopping.

✅ It changes things. You approve.

An agent can propose a change and show you a preview; a person applies it. Pause a campaign, add negative keywords, set a budget or a bid, create a GA4 key event or audience, publish a Tag Manager version, annotate Mixpanel. Every change set is previewed, checked against guardrails you set, applied only after approval, and can be rolled back. The agent can propose and inspect. It cannot approve or apply. That decision lives in code the model never sees, and there is a test that keeps it that way.

🧠 It remembers

Duct keeps a memory of your business, your projects and the work it has done: the CPA target, the campaign you told it to ignore (and that you were the one who said so), the finding from last month's brief. Every fact knows when it was true and what replaced it, so an answer can say why it believes something. You can read the whole timeline, correct it, pin what matters, pause it or reset it.

🔌 Connectors, and more every month

Google Ads · Google Analytics 4 · Search Console · Tag Manager · Meta Ads · Apple Search Ads · OpenAI Ads · Mixpanel · Microsoft Clarity · GrowthBook · Stripe · RevenueCat · GitHub, with HubSpot next and new ones landing as the agents need them. What each one reads and can change: getduct.ai/integrations.

Google connects with OAuth, read-only unless you grant more; the rest take a key you paste. Credentials are encrypted at rest, scoped to one project at a time, and Duct tells you exactly which permissions it has and which it is missing.

👥 Built for a team

Projects hold the context. Invite collaborators, share a report with them by link, and every brief, audit and plan stays in the project's library, versioned, for the next person who asks.

🖥️ The desktop app

Native on macOS, Windows and Linux. Model keys live in the OS keychain, sign-in runs in your own browser, updates are signed, and it says hello with a mosaic. Download it.

🏠 Self-host it

The same app can be built with the backend inside: SQLite on your disk, loopback only, no account, nothing leaving the machine. Or run the backend on your own server:

git clone https://github.com/5hirish/duct.git && cd duct
make setup
cp backend/.env.example backend/.env.local   # add one model provider key
make serve-backend                            # then, in a second terminal:
make serve-app

CONTRIBUTING.md has the full setup, and desktop/README.md covers the self-host build.

🧭 How it is built

Python and FastAPI on the backend, Next.js in the browser, a Tauri shell on the desktop, one repository. docs/architecture.html is the interactive map: open it in a browser, pick the job you came to do, and it walks you to the files. The Duct Doctrine is the short version of what the project believes, each tenet linked to the code that enforces it.

🤝 Contributing

Start with CONTRIBUTING.md. Not touching code? CONTRIBUTOR-PLAYBOOK.md is for design feedback, writing and product proposals. Everyone who helps is credited in CONTRIBUTORS.md. Agent-written contributions are welcome; the PR template asks where an agent helped so a reviewer knows where to look. Security issues go to SECURITY.md, never a public issue.

💬 Community

Questions and ideas go in Discussions, bugs and proposals in [Issues](https://github.com/5hirish/duct/issu