Claude Opus 5.5·
GPT-6 Astra·446 models in one dropdownSpinBuild builds full-stack apps and websites. Fast.
SpinBuild (spinbuild.ai) is a vibe coding platform. Describe the product in plain language and it builds the frontend, backend, and database, then runs it live so you can watch it take shape. Preview your changes, publish whenever you want. Write code for a living? Switch on review and approve every diff.
No card needed. Your code, your GitHub, your database — always yours.
- Next.js 16 + Postgres, every project
- Every app kernel-isolated
- A private database per app
- Live preview in under a minute
- Two-way sync with your GitHub
- No code to read — unless you want to
The facts
What is SpinBuild?
SpinBuild is a vibe coding platform at spinbuild.ai. You describe an app or website, it writes the full stack, and you publish what you approve.
- Product
- SpinBuild, a vibe coding platform at spinbuild.ai
- Stack
- Next.js by default, plus React, Vite, Preact, Vue, Svelte, Astro, Express, Fastify, Koa, or plain HTML/CSS/JS
- Database
- Postgres 16, one private database per project
- Review
- Changes apply as they land, or wait for your approval — your choice
- Code
- Two-way sync with a GitHub repository you own
- Hosting
- One-click HTTPS on your-app.apps.spinbuild.ai
- Price
- Starter is free and does not require a card
- Isolation
- Each app runs in its own kernel-isolated container
Built on SpinBuild so far
0
Builders
0
Projects created
0
Live deployments
Every frontier model, one dropdown — Claude Opus 5, Claude Sonnet 5, GPT-6 Astra, DeepSeek V4.1, Qwen3.8, Kimi K3 and 440 more.
- Claude
- OpenAI
DeepSeek
Qwen
Moonshot
Google
Meta
Mistral
Z.ai
xAI
The short version
See it in action.
SpinBuild turns a description into a live app: you describe it, review the diff, and deploy it to an HTTPS URL.
THE PROMPT
Describe your idea
Your words. The starting point.
THE CONTROL
Make it yours
Review every change before it lands.
THE LAUNCH
Ship to the world
One deploy. A live URL. All yours.
Every model, one dropdown
Pick the right brain for the moment.
SpinBuild lets you choose the model — Claude Opus 5, Claude Sonnet 5, GPT-6 Astra, DeepSeek, Qwen, Kimi, and 440 more — or it picks one for you. Each card shows what the model is good at, its context window, and its price.
Claude Opus 5
The default for new accounts. Reach for it when a feature has to be right. It holds a large codebase in its head and reasons carefully through tricky refactors.
Context window
1M tokens
Input / 1M tokens
$5.00
Output / 1M tokens
$25.00
Context and pricing stay up to date automatically.
You're in charge
Preview your changes. Publish when you're ready.
Changes land in your preview as you go, so you judge the thing itself rather than a diff. Nothing reaches the public until you press Publish — and every version is one click away if you want to go back. If you'd rather approve every edit first, turn review on in Settings and SpinBuild waits for you, file by file.
Watch each change appear in the live preview.
Jump back to any earlier version, any time.
Developers: switch review on for diffs and per-file accept.
schema.prisma
− model User { id String @id }
+ model User { id String @id · email String · projects Project[] }
+ model Project { id String @id · owner User @relation… }
The whole thing
Real full-stack apps.
SpinBuild builds a complete app from the first prompt: the interface, the backend, and a Postgres database, running live in its own space. The preview is the real app, not a mockup.
Interface, backend, and database together.
A real Postgres database for every project.
A live preview that's the actual app.
Interface
UI, routes, components
Backend
APIs and business logic
PostgreSQL
Real database per project
It keeps up with you
Watch it come together, live.
SpinBuild streams the code as it writes it, and the preview updates when you accept a change. You see the new version on the preview before anything is published.
AI responses stream in as they're written.
Your preview refreshes the instant you approve.
Everything stays in sync, moment to moment.
Live stream
Planning routes…
Writing app/dashboard/page.tsx
Preview updated · approved changes applied
Your pick
The right model for the moment.
SpinBuild lets you switch models in one dropdown, from a fast model for a sketch to a stronger one to finish. You choose how much each step costs.
Model
Claude Opus — default builder
Claude Sonnet — everyday driver
GPT-6 Astra — big context
From build to live
Works with GitHub, both ways.
SpinBuild syncs with a GitHub repository you own. Changes here are pushed up; commits made anywhere else — a teammate, the GitHub editor, your own laptop — are pulled back down and the preview follows. Publishing to an HTTPS URL is one click, and the code is a normal Next.js app you can run somewhere else.
Two-way sync: push and pull, automatically.
One-click deploy to a live URL.
Your code, yours to keep.
GitHub
synced · your-org/spinbuild-app
Deploy
live · https://app.spinbuild.ai
Built like infrastructure
Serious enough for the apps you actually rely on.
SpinBuild runs each app in its own isolated container, gives it a private Postgres database, and syncs the code to a GitHub repository you own.
Every app runs fully isolated
Each project runs in its own isolated container. Capabilities dropped, hard CPU, memory and process limits, no privilege escalation.
Your own private database
Each project gets its own Postgres database and its own credentials, provisioned automatically and wired into the app's .env. One app can never read another's data.
Previews only you can open
preview--your-app.apps.spinbuild.ai answers to the project owner alone. Secrets in .env are never shown to the model and never pushed to GitHub.
Every change reviewed, every version kept
Turn on review and the model proposes while you accept or reject file by file, with a real diff. Either way every change is a version you can roll back to at any time, including anything pulled in from GitHub.
Your repo, your code
One-click sync to a GitHub repository you own. Export everything, any time — there is no lock-in in the way the code is written.
Deploy to your own URL
Ship to your-app.apps.spinbuild.ai over HTTPS in one click, with the same isolation as the preview and the database that goes with it.
How it works
Three steps to a live app.
You describe the app, watch it appear in the preview, and publish it to an HTTPS URL whenever you're happy. The same three steps apply to the first prompt and the five-hundredth.
- 1
Describe it.
Say what you want to build, in your own words. SpinBuild reads your whole project first, then plans the change — schema, routes, UI — before it writes a line.
Build an invoicing app for my agency: clients, invoices with line items, PDF export, and a dashboard of what's overdue.
Claude Opus 5Any of 446 models
- 2
Preview it.
Changes apply as they land and the preview updates in front of you — no diffs to approve unless you want them. Every version is kept, so going back is picking one from a list. Write code for a living? Turn review on and every edit waits for your accept.
app/invoices/page.tsx+42 −6const invoices = MOCK_INVOICES;
+ const invoices = await listInvoices({ overdueFirst: true });
+ const totals = summarise(invoices);
Applied · preview updated v13Every version, one click back
- 3
Ship it.
Push to a GitHub repo you own and go live on your own HTTPS URL in one click — same isolation, same database, no infrastructure to set up.
GitHub
your-org/agency-invoicing
Live
agency-invoicing.apps.spinbuild.ai
GitHub sync · one-click deploy
Compare
SpinBuild, Lovable, Bolt, and Base44.
SpinBuild, Lovable, Bolt, and Base44 are chat-based app builders. They differ on the database, GitHub sync, custom domains, and sign-in for the app's users. This table uses each product's own documentation. It is not a ranking.
| Feature |  SpinBuild |  Lovable |  Bolt |  Base44 |
|---|---|---|---|---|
| What it is | Vibe coding platform for full-stack apps and websites | App and website builder | AI builder for websites, apps, and prototypes | Vibe coding platform for apps and websites |
| How you build | Describe it. Changes land in the preview; turn on review for diffs. | Describe it in chat. Edits land in the project, and you can revert. | Describe it in a browser IDE and work in the code. | Describe it. Aimed at people who don't want to write the code. |
| What you get | A Next.js app: interface, backend, and a private Postgres database | A React app with Supabase or Lovable Cloud | Several frameworks, plus Bolt Cloud for data and hosting | An app on Base44's runtime and built-in backend |
| Database | Private Postgres with every project | Postgres through Supabase or Lovable Cloud | Built-in database on Bolt Cloud | Built-in MongoDB-compatible database |
| Your code | Standard Next.js. Two-way GitHub sync with a repo you own. | Two-way GitHub sync. You can clone it and host it yourself. | GitHub sync. The code can run on another host. | GitHub on the Builder plan and above, with two-way sync. |
| Go live | One click to an HTTPS URL on SpinBuild | Lovable hosting. A custom domain is on paid plans. | Bolt hosting, or a host you choose | Live on Base44 as soon as the app exists |
| Your own domain | Not yet | Yes, on paid plans | On Bolt hosting, or wherever you deploy | Yes, on Base44 hosting |
| Sign-in for your app's users | Not built in yet | Yes, through Supabase or Lovable Cloud | Yes, through Bolt Cloud | Yes, built in |
| Choose the model | Yes. You pick the model. | Lovable runs its own pipeline. | You can choose among Bolt's models. | Base44 runs its own models. |
| Start | Free plan, no card | Free tier, with limits | Free tier, with limits | Free tier, with limits |
Snapshot from public docs in October 2026: Lovable, Bolt, and Base44. They change their plans and features. SpinBuild does not yet offer a custom domain or built-in sign-in for your app's users.
Simple plans that grow with you.
Start free with 250 credits and no card. Where a plan offers more than one monthly allowance, pick the credits that match how much you build.
A credit is a slice of real model usage, not a flat per-message charge: a small edit costs a fraction of one, a long build on a heavier model costs several. How credits work
Compare all featuresFAQ
Questions people ask before they build.
SpinBuild is a vibe coding platform for full-stack apps. These answers cover what it builds, who owns the code, and how it differs from Lovable, Bolt, and Base44.
How do I get started?
Sign up with email, Google, or GitHub. Describe the app you want in plain language — SpinBuild builds the frontend, backend, and a private Postgres database. Starter is free and does not ask for a credit card. No download to install; you build in the browser.
What programming languages does SpinBuild support?
SpinBuild builds web apps in JavaScript and TypeScript. You choose the framework when you create a project — Next.js is the default stack. You can also start on React, Vite, Preact, Vue, Svelte, Astro, Express, Fastify, Koa, or plain HTML/CSS/JS. Describe the product in plain language; review and approve every change before it ships.
Which AI models power SpinBuild?
You pick the model in the builder — Claude Opus 5 is the default, and the same dropdown includes Claude Sonnet, GPT, and hundreds of other models. We keep the catalogue current so you can switch when a stronger or cheaper model fits the step.
How does SpinBuild's pricing work?
Starter is free forever with no credit card. Usage is metered in credits: cost depends on the model, thinking level, and how much work the request took. Paid plans raise monthly credits and limits. See the pricing page for each plan; credits reset monthly and do not roll over.
Need help or have feedback?
Email support@qyant.dev for help with your account, preview, or deployed app — and for product feedback. For sales or enterprise, use contact@qyant.dev.
What is SpinBuild?
SpinBuild is a vibe coding platform for full-stack apps and websites. You describe the product in plain language. SpinBuild builds the frontend, the backend, and a Postgres database, lets you review every change, and publishes it to a live URL.
What is vibe coding?
Vibe coding means describing the software you want instead of writing it line by line. The builder turns that description into a working app. In SpinBuild you still see the diff and decide what lands, so the result is code you can read and keep.
Can SpinBuild build a full-stack app, not just a landing page?
Yes. Every project starts as a Next.js app with an interface, API routes, and its own Postgres database. The preview is that app running, not a mockup.
How is SpinBuild different from Lovable?
Both turn a description into an app, and both sync two ways with GitHub. SpinBuild gives every project a private Postgres database, lets you pick the model, and applies changes straight to the preview — with an optional review step that shows each change as a diff if you write code. Lovable already offers sign-in for your app's users and custom domains on paid plans. SpinBuild does not, yet.
How is SpinBuild different from Bolt?
Bolt is a browser IDE for websites, apps, and prototypes, with several frameworks and Bolt Cloud for data and hosting. SpinBuild stays on one stack, Next.js plus Postgres, and asks you to approve each file before it lands. Bolt is the better fit if you want to pick Vue, Svelte, or another framework.
How is SpinBuild different from Base44?
Base44 is a vibe coding platform whose backend, database, sign-in, and hosting all live on Base44. Its database is MongoDB-compatible, and the app is shareable as soon as it exists. SpinBuild generates a standard Next.js app with Postgres that you can sync to your own GitHub repo. Base44's GitHub integration, including two-way sync, is on the Builder plan and above.
What about v0 and other AI builders?
v0 is built around generating interface code and deploying on Vercel. SpinBuild starts every project as a full-stack Next.js app with its own database. Other builders trade off the same things: how much of the backend you own, whether you review the code, and where the app is hosted.
Do I need to know how to code?
No. You can describe the app and ship it. If you do write code, the diffs, the GitHub repo, and the Next.js project are there when you want them.
Do I own the code SpinBuild writes?
Yes, and it works both ways. SpinBuild pushes the project to a GitHub repository under your account, and commits made anywhere else — a teammate, the GitHub web editor, your own laptop — are pulled back into the project automatically, with the preview updating to match. It is a normal Next.js app with Postgres, so you can run it on your laptop, Vercel, or a server.
Is SpinBuild free?
The Starter plan is free and does not ask for a card. Paid plans raise the limits. Hiding the Edit with SpinBuild badge is included on Pro and above. The badge stays on for Free and Lite.
How do you contact SpinBuild?
Email contact@qyant.dev for sales and enterprise. For help with an account, preview, or deployed app, email support@qyant.dev. You can also use the contact form at spinbuild.ai/contact.
Start today
Your next app starts with a sentence.
You start a SpinBuild project by describing the app in one sentence. The Starter plan is free, and the code stays yours.
- Free plan, no card needed
- Your code in your GitHub, any time
- A private Postgres per app
- Kernel-isolated, owner-only previews
Or start from one of these
Each one opens the builder with the prompt ready to send.