Build an MVP in 48 Hours With Open-Source AI Tools (2026 Stack)

Building an MVP in a weekend used to be a stunt. In 2026, it's the new normal — AI coding tools + curated OSS stacks make 48-hour builds genuinely possible.

This is the exact stack I'd use, with one-line install commands and the curator takes for each pick.

The 48-hour breakdown

Hours	What you do
Hour 0-4	Pick stack + scaffold project
Hour 4-12	Build core feature (let AI handle most of it)
Hour 12-20	Add auth + payments
Hour 20-30	Build UI + polish
Hour 30-40	Deploy to production
Hour 40-48	Test + ship + announce

The exact stack — full picks

1. Frontend framework: Next.js 15

Next.js 15 — the React framework with App Router and Server Components

pnpm create next-app@latest my-mvp --typescript --tailwind --app

Next.js is the right default. App Router, Server Components, edge runtime, Vercel/Railway deploys in one click.

**Alternative:** Astro if your MVP is content-heavy (a blog, marketing site, docs).

Full Next.js vs Astro comparison.

2. UI components: shadcn/ui

pnpm dlx shadcn@latest init
pnpm dlx shadcn@latest add button card dialog form input table

shadcn/ui gives you copy-paste primitives. Beautiful defaults, accessibility baked in, no npm dependency to break.

**Alternative if you want pre-styled:** Mantine (more components out of the box).

For animations: Motion (Framer Motion):

pnpm add motion

3. Backend: Supabase

pnpm add @supabase/supabase-js @supabase/ssr

Supabase gives you Postgres + Auth + Storage + Edge Functions in one platform. Free tier covers you to ~1,000 users.

Why not just use Next.js API routes + a separate DB? You can. But Supabase saves you 4-6 hours of auth setup and gives you Row-Level Security baked in.

4. Auth: Built-in via Supabase

Supabase Auth supports email + magic links + OAuth (Google, GitHub, Apple) out of the box.

const { data, error } = await supabase.auth.signInWithOAuth({
  provider: 'google',
  options: { redirectTo: `${window.location.origin}/auth/callback` }
});

If you're not using Supabase, **Better Auth** is the modern 2026 pick.

Better Auth vs NextAuth comparison.

5. Database / ORM: Drizzle

pnpm add drizzle-orm
pnpm add -D drizzle-kit

Drizzle is the modern TypeScript-first ORM. Edge-compatible, zero runtime overhead, SQL-like syntax.

**Alternative:** Prisma — better DX, heavier runtime. Pick Prisma if DX matters more than performance.

Prisma vs Drizzle comparison.

6. Forms: React Hook Form + Zod

pnpm add react-hook-form zod @hookform/resolvers

React Hook Form for state, Zod for validation. The dominant 2026 form stack.

Yup vs Zod comparison.

7. AI integration: Vercel AI SDK

pnpm add ai @ai-sdk/anthropic @ai-sdk/openai

The Vercel AI SDK handles streaming, structured outputs, tool calling for any LLM (Claude, GPT, Gemini, local Ollama).

For development, use Ollama to run Llama 3.3 locally:

ollama run llama3.3

For agents (multi-step LLM workflows): LangChain, LlamaIndex, or Mastra (JS-first).

Open-source AI agent frameworks compared.

8. Payments: Razorpay (India) or Stripe (global)

If India-first: pnpm add razorpay. UPI + cards + subscriptions.

If global: Stripe. Same simplicity.

Critical: verify webhook signatures server-side. Skipping this is the #1 payment bug in indie SaaS.

9. Email: Resend + react-email

pnpm add resend react-email

react-email lets you write email templates in JSX. Resend handles delivery. Free tier covers 3,000 emails/month.

10. Deployment: Vercel or Railway

Vercel if you're Next.js-only and don't need long-running backend processes. Free tier is generous.

Railway if you have workers, cron, or websockets. Pay-as-you-go.

Skip AWS until you have real product-market fit. The complexity will eat your weekend.

The 48-hour timeline

Hours 0-4: Pick + scaffold

# Create the app
pnpm create next-app@latest my-mvp --typescript --tailwind --app
cd my-mvp

# Install everything
pnpm add @supabase/supabase-js @supabase/ssr drizzle-orm react-hook-form zod @hookform/resolvers motion ai @ai-sdk/anthropic resend react-email

# UI primitives
pnpm dlx shadcn@latest init
pnpm dlx shadcn@latest add button card dialog form input table sonner

Set up Supabase project. Create one DB table for your core entity. Set up RLS policy (auth.uid() = user_id).

Hours 4-12: Build core feature with AI

Open Cursor or Cline. Describe your core feature in 2-3 sentences. Let AI write the first pass. Review + fix.

**Pro tip:** paste the **Ship a SaaS bundle** into your AI agent's context. It knows the stack and writes code consistent with it.

Hours 12-20: Add auth + payments

Auth: Supabase Auth UI components handle the whole sign-in/sign-up flow.

Payments: Stripe Checkout or Razorpay Standard Checkout. ~30 lines of code total.

Hours 20-30: UI + polish

Apply shadcn components. Add Motion animations on key transitions. Use Lenis for smooth scroll on landing page.

Hours 30-40: Deploy

# Vercel
pnpm dlx vercel

# Or Railway
pnpm dlx railway up

Set env vars. Connect domain.

Hours 40-48: Test + ship + announce

End-to-end test (sign up → use feature → pay → success).

Post on:

Twitter/X with the 3-tweet thread template
LinkedIn with the launch post
ProductHunt (schedule for next Tuesday)

What you don't do in 48 hours

Be honest about scope:

Don't write tests. Real users find bugs faster than you can write tests. Launch first.
Don't polish to perfection. v1 should embarrass you. v3 should embarrass you less.
Don't add features beyond core. Settings page, profile editing, dark mode — all v2.
Don't optimize performance. Optimize for the first 100 users, not 100k.

The curated 48-hour bundle

We curated the **complete Ship-a-SaaS bundle** with 40+ open-source repos picked specifically for fast MVP builds. Every repo has a curator take and "use this if / skip if" clause.

Want it now? **Lifetime membership** is ₹99 (or $2.99 international). Pay once, get the full directory + 13 stack bundles + 12 skill tracks forever.