Get Started

For v0 builders

v0 nailed your interface.
The backend is the other 80%.

Here's the thing nobody disputes: v0's components are genuinely production-ready — as UI. What's missing is everything behind them, and that's by design, not a flaw: your login form has no identity provider, your pricing page has no billing engine, your dashboard renders mock data. useDeploy is the entire backend those components are waiting for — auth, organizations, billing, and a typed API contract your frontend can trust.

v0 stops at the component boundary — on purpose

v0 won't generate the backend those components need to actually function — no API routes, no database queries, no authentication logic — and that's a product decision, not a temporary limitation the next model update will erase. The login form makes it concrete: v0 gives you a gorgeous one — email field, password field, submit button — but submitting it does nothing meaningful. There's no identity provider, no session management, no password hashing, no token generation. Multiply that by every surface a SaaS needs: the settings page with no user record behind it, the billing page with no subscription state, the team switcher with no organizations to switch. The UI layer is done. The system isn't.

What has to exist behind your components

An identity provider

Sessions, password hashing, email verification, password reset, magic links, 2FA — the machinery behind that login form.

Subscription state

Plans, checkout, a customer portal, and webhook handling that reconciles what the provider says with what your database believes.

Organizations and roles

The team switcher needs orgs, memberships, invitations, and permission checks the API actually enforces.

A real API surface

Endpoints with validation, auth middleware, and rate limits — not fetch calls to routes that don't exist.

Transactional email

Verification, resets, and invites — sent by the backend your form finally has.

Operational visibility

Logs, error tracking, and metrics for the system your UI is now talking to.

A backend that boots with everything registered

useDeploy is a Bun + Express backend organized in bounded contexts — iam, tenancy, billing, storage — each with its routes, use cases, and Prisma repositories. It boots with four env vars; every optional adapter (Sentry, OpenTelemetry, S3, Redis) stays a no-op until configured. One command, and your v0 components have a real system to talk to.

bun run dev
 1  $ bun run dev
 2  [boot] env ok (4 required vars)
 3  [modules] iam ✓ tenancy ✓ billing ✓ storage ✓ webhooks ✓
 4  [jobs] bullmq schedulers registered
 5  [otel] disabled (no endpoint set) — no-op
 6  [http] listening on :3001 — /metrics ready

Production-grade before your first commit

Typed contract, end to end

The OpenAPI schema is generated from the server and consumed via openapi-fetch — your components call typed paths, and drift between client and server fails CI, not production.

Auth, complete

Cookie-based sessions with the full flows — verification, reset, magic link, 2FA — and no token plumbing leaking into your components.

Billing behind one port

Stripe, MercadoPago subscriptions, and Polar behind a single IPaymentProvider interface, with webhook idempotency keyed on externalOrderId.

Multi-tenancy enforced below the API

Orgs, RBAC, invitations, API keys — and a tenant-isolation guard that turns cross-org access into a 404 at the repository layer.

Events that survive restarts

A durable outbox event bus: side effects are persisted first, then retried until done.

Verified continuously

450+ tests plus a Playwright golden-path gate (register → org → invite → billing) on every change.

Your migration path from v0

This is the smoothest migration in the family, because there's no conflict to resolve: v0 provides the frontend, useDeploy provides the rest. Your components are shadcn/ui-flavored React — useDeploy's Next.js client lives in the same world, so pasting them in is mostly a matter of folder placement. From there, replace mock data with calls through the typed client: form schemas come from the shared @app/contracts package instead of being redefined locally, so the shape your form submits is — by construction — the shape the server expects. Keep generating UI in v0 forever if you like; useDeploy is the system it plugs into.

v0 questions, answered

Do v0 components drop into useDeploy directly?+
Mostly, yes. Both sides speak React + Tailwind + shadcn/ui conventions. You paste the component, then wire its data to the typed API client instead of mock props.
Can I keep the frontend on Vercel?+
Yes. The Next.js client deploys to Vercel while the Bun + Express backend runs on Railway, Docker, or Dokploy. Cookie-based auth works across the split with CORS configured — one env var.
What stops my frontend and backend from drifting apart?+
The contract. Server routes generate an OpenAPI schema; the client consumes types generated from it; CI fails if they're stale. A renamed field is a build error, not a runtime 400.
Does useDeploy fight with the code v0 writes?+
No — they own different layers. v0 writes presentational components; useDeploy owns auth, data, billing, and the API. The boundary between them is the typed contract, which is exactly where you want it.

One license. Two ways to own it.

CORE

Founder

$99one-time

A frozen snapshot of UseDeploy. Yours forever, no updates.

  • Frozen-version zip download
  • Full source, commercial use, unlimited projects
  • All 800+ tests · all docs pages
  • 14-day refund
RECOMMENDED

LATEST + UPDATES

Lifetime

$199$249one-time

Always the latest UseDeploy. Re-download every release, free.

  • Latest-version zip — re-downloadable forever
  • Every future release at no extra charge
  • Priority Discord support
  • All 800+ tests · all docs pages
  • 14-day refund

Give your components a system

Your v0 UI is ready. Connect it to a backend with auth, billing, orgs, and a typed contract — engineered and tested before you got here.

Get useDeployBrowse the docs