duply

Build your product from the first prompt.

A production-ready starter kit for AI coding tools, with every screen and integration already in place.

Use it with your AI coding tool
Claude CodeClaude CodeCodexCodexCursorCursorGemini CLIGemini CLICopilotCopilot
duplylive
add auth and billing
  • Authwired
  • Paymentswired
  • AI chatwired
  • Searchwired
  • SEO + emailwired
600+
Dev hours saved
~$45k
Money saved
Day 1
Time to first ship
$0
Monthly fee
Unlimited
Projects you can ship
None
Coding knowledge needed
ReactReactTypeScriptTypeScriptTailwindTailwindViteViteSupabaseSupabaseStripeStripeResendResendVercelVercelPostHogPostHogCloudflareCloudflare

The same prompt, a very different result.

Hand a feature request to an empty repo and you get guesswork. Hand it to the kit and you get something shaped, on a real foundation.

Without the kit, prompting from scratch
localhost:3000
AI-powered platform
The smarter way to
manage your work
Everything you need to streamline your workflow, in one place.
Feature 1
Streamline your daily tasks.
Feature 2
Streamline your daily tasks.
Feature 3
Streamline your daily tasks.
With the kit
yourapp.com
AcmeProductPricingDocsGet started
Ship faster,
from day one.

A clear, structured landing with real hierarchy and one rationed action.

Get the kitSee demo
Activity
Usage
Signups

The sign-in your users expect, already built.

Start from finished auth flows, not empty forms. Email, social, SSO, MFA and roles are wired to a single seam, so your AI tool connects a provider instead of inventing the whole thing.

  • Email, magic link and SMS

    Password, reset, verification and one-time codes, all flowing from day one.

  • Social and SSO

    Google, GitHub and Apple, plus SAML sign-on for company accounts.

  • MFA and passkeys

    Authenticator codes, Face ID and device passkeys for safer accounts.

  • Roles and protected routes

    Owners, admins and members with permission checks on every route.

Welcome back
you@company.com
••••••••
Forgot password?
Sign in
or
Continue with Google
MFAPasskeysSSORate limited

Start taking payments without starting from scratch.

A pricing page, checkout, customer portal and subscription screens ship ready. Connect Stripe first and keep the same surface as you add Lemon Squeezy, Polar or PayPal later.

  • Hosted checkout

    A secure hosted checkout, so there are no card forms for you to build.

  • Customer portal

    Cards, invoices and cancellations your users handle themselves.

  • Plans and invoices

    Subscription management and billing history already shaped for you.

  • Swap providers later

    The same flows, with a new provider mapped onto the existing seams.

Pay duply
$29.00
you@company.com
4242 4242 4242 4242
09 / 28
CVC
Pay $29.00
Works with Stripe, Lemon Squeezy, Polar

AI chat and search, already part of the product.

A chat assistant and knowledge search render on mock data from the first run. Connect your model, data and retrieval when ready, without redrawing the interface.

  • Chat assistant

    A working conversation surface your users can talk to from day one.

  • Knowledge search

    Semantic search over your content, ranked by meaning rather than keywords.

  • Bring your own model

    OpenAI, Anthropic or Gemini behind one key, swapped without touching the UI.

  • Sources and citations

    Answers cite the files they used, so people can check the work.

Claude Sonnet
Summarize last week’s signups.
412 new signups, up 18% on the prior week. Most arrived from the pricing page, and 64% completed onboarding.
Sourcesanalytics.tsbilling.md
Ask anything...

Everything else, already in the box.

Past the headline features, the rest of a real product is here too, each behind one marked seam.

+18% this week

Analytics, live from day one

GA4 and PostHog seams, with the dashboard already shaped.

Knowledge search

Search by meaning

Email and newsletter

Broadcasts and capture, in-app.

live

One-click deploy

Vercel, Netlify or Cloudflare.

Multi-language

ENESDEFRPT

Dark mode

Content and docs

Blog, docs, SEO and legal.

Pick a design from the library. Get a kit in that exact language.

Every color, font and radius in the kit traces back to one DESIGN.md. Choose a look from the duply library, drop in its file, run the token build, and the whole kit restyles. No component edits, no find and replace.

  • One file, not a theme config

    DESIGN.md holds the whole visual language as plain role tokens.

  • Swap, then rebuild

    Run the token build and every screen takes the new brand at once.

  • Nothing hardcoded

    Components read role tokens, so there is no hex to chase down.

DESIGN.mdduply / library
primary:   #14210f
accent:    #c9ff3d
canvas:    #faf9f4
ink:       #14210f
font:      Space Grotesk
radius:    8px
LetterpressObservatoryNeoCapsule

Skip months of boilerplate.

Here is the bill if you wire all of this yourself, against a one-time license.

  • Authentication96 h
  • Design system and dark mode120 h
  • AI chat and search88 h
  • Blog, docs, SEO and legal72 h
  • Subscription billing60 h
  • App screens60 h
  • Internationalization40 h
  • Email, newsletter and contact32 h
  • File uploads24 h
  • Analytics16 h
  • Subtotal600+ hrs
  • At a contractor’s ~$80/hr$25k to $65k
With the kit
Included
You save 600+ hrs
ship on day one

Or run your own numbers.

Slide in the hours and your rate, and compare building this stack against a one-time license.

120 h
$95/h
Building it yourself
$11,400
The kit, one time
$225
You save
$11,175

Everything in the kit, counted.

Not a teaser. A full product you can click through before you wire a single key.

27
Screens shipped, marketing and app
20+
Agent wiring skills, one per integration
1
DESIGN.md restyles every screen
0
Credentials needed to run it

Non-coders get a real product foundation and developers skip the boilerplate, because every screen runs on mock data and every integration has a matching skill.

Pay once, ship forever.

No subscriptions. One purchase gives you the full source, the design system and every wiring skill, across unlimited projects.

$299$225one time

One payment, full access.

  • Lifetime license, no renewals
  • Unlimited projects, yours and clients
  • Full source, no black boxes
  • Every integration ships with a skill
Get the kit
Production app foundation

Auth, billing, dashboard, files, settings and routing.

AI product features

Chat, search, command palette and bring your own provider.

Content and growth

Blog, docs, SEO, LLMO, legal, contact, newsletter and analytics.

Design system included

DESIGN.md, dark mode, tokens and reusable sections.

AI coding workflow

Multi-IDE rules, 20+ skills and marked integration seams.

Lifetime license

Full source, unlimited projects, personal or client work.

The objections, answered.

What exactly do I get?

The full TanStack Start source for the kit: every screen built and clickable on mock data, with the integration seams clearly marked and a matching agent skill for each one.

Is this another no-code builder?

No. It is real, editable code in your own repo. There is no proprietary editor or runtime to escape from, so you keep working the way you already do.

I can't code, can I still use this?

Yes. The screens already work on mock data, and each integration has a plain-language skill that walks an AI agent through wiring it. You describe what you want, the agent follows the skill.

Will this help if I already know how to code?

Yes. You skip the boilerplate and start from finished flows. The seams are greppable, so you can jump straight to the parts you actually want to change.

Why not just prompt my app from scratch?

From-scratch prompting drifts and leaves half-built screens. Here the structure, design system, and seams are already decided, so the agent fills in known gaps instead of inventing the whole app.

Which AI tools does it work with?

Any agent that can read files and run commands. The skills are plain Markdown, so Claude Code, Codex, Cursor, and Gemini all read them the same way.

Do the features come ready out of the box?

Every screen renders complete on mock data from day one. To go live you wire each seam to a real provider by following its skill, at your own pace.

Where do I start after I buy?

Clone the repo, run the dev server, and click through the working app. Then grep for the seam comments to see exactly what is mocked and which skill wires each one.

Do I own the code?

Yes. It is your repo to edit, fork, and ship. The license is one-time with no subscription and no lock-in.

Can I use it for client work or multiple products?

Yes. One lifetime license covers unlimited projects, including work you build and ship for clients.

Start from finished.

Skip the empty folder. Hand your AI tool a kit that already knows the stack.