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niuniu
niuniu

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I Built a Complete Web App for $0 — Here's My Free Tech Stack

The $0 Full-Stack Challenge

Last month, I set out to prove something: you can build and ship a production-ready web app without paying for anything. No trial periods, no credit cards, no "free tier traps."

Here's exactly what I used — and how you can replicate it.

🏗️ The Stack (100% Free)

Layer Tool Free Tier
Frontend Hosting Vercel Unlimited deployments, 100GB bandwidth
Database Supabase 500MB storage, 50K monthly active users
Auth Supabase Auth 50K monthly active users
Storage Cloudflare R2 10GB storage, 10M reads/month
AI Coding MonkeyCode Free local AI code assistant
CI/CD GitHub Actions 2,000 minutes/month
Monitoring Sentry 5K errors/month

Step 1: Set Up the Project 

# Create a Next.js app
npx create-next-app@latest my-free-app --typescript --tailwind --app
cd my-free-app

# Install Supabase
npm install @supabase/supabase-js @supabase/ssr
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Step 2: Configure Supabase (Free Database + Auth)

Create a free project at supabase.com:

// lib/supabase.ts
import { createClient } from '@supabase/supabase-js'

const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL!
const supabaseKey = process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!

export const supabase = createClient(supabaseUrl, supabaseKey)
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Set up your database schema:

-- Run in Supabase SQL Editor
CREATE TABLE posts (
  id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
  title TEXT NOT NULL,
  content TEXT,
  created_at TIMESTAMPTZ DEFAULT NOW(),
  user_id UUID REFERENCES auth.users(id)
);

-- Enable Row Level Security
ALTER TABLE posts ENABLE ROW LEVEL SECURITY;

CREATE POLICY "Users can read all posts" ON posts
  FOR SELECT USING (true);

CREATE POLICY "Users can insert own posts" ON posts
  FOR INSERT WITH CHECK (auth.uid() = user_id);
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Step 3: Deploy to Vercel (Free Hosting) 

# Install Vercel CLI
npm i -g vercel

# Deploy (connects to your GitHub repo)
vercel --prod
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Vercel's free tier gives you:

  • Unlimited static sites and serverless functions
  • 100GB bandwidth per month
  • Automatic HTTPS and global CDN
  • Preview deployments for every PR

Step 4: Add AI Features with MonkeyCode

While building, I used MonkeyCode as my AI coding assistant. It runs entirely locally — no API keys, no usage limits:

// MonkeyCode helped me generate this entire API route
// app/api/posts/route.ts
import { NextResponse } from 'next/server'
import { supabase } from '@/lib/supabase'

export async function GET() {
  const { data, error } = await supabase
    .from('posts')
    .select('*')
    .order('created_at', { ascending: false })
    .limit(50)

  if (error) {
    return NextResponse.json({ error: error.message }, { status: 500 })
  }

  return NextResponse.json(data)
}

export async function POST(request: Request) {
  const body = await request.json()
  const { data, error } = await supabase
    .from('posts')
    .insert(body)
    .select()

  if (error) {
    return NextResponse.json({ error: error.message }, { status: 500 })
  }

  return NextResponse.json(data, { status: 201 })
}
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Step 5: File Storage with Cloudflare R2 

// lib/r2.ts
import { S3Client } from '@aws-sdk/client-s3'

// Cloudflare R2 is S3-compatible — 10GB free
export const r2 = new S3Client({
  region: 'auto',
  endpoint: `https://${process.env.CF_ACCOUNT_ID}.r2.cloudflarestorage.com`,
  credentials: {
    accessKeyId: process.env.R2_ACCESS_KEY_ID!,
    secretAccessKey: process.env.R2_SECRET_ACCESS_KEY!,
  },
})
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💰 Free vs Paid Comparison

Feature Free Stack Paid Alternative
Hosting Vercel (free) AWS EC2 (~$15/mo)
Database Supabase (free) PlanetScale Pro ($29/mo)
Auth Supabase Auth (free) Auth0 ($23/mo)
Storage Cloudflare R2 (free) AWS S3 (~$5/mo)
AI Coding MonkeyCode (free) GitHub Copilot ($10/mo)
Total $0/month ~$82/month

That's $984/year saved.

🚀 Full Deployment Checklist

  1. ✅ Create Supabase project (free)
  2. ✅ Set up database tables and RLS policies
  3. ✅ Connect Vercel to GitHub repo
  4. ✅ Add environment variables in Vercel dashboard
  5. ✅ Deploy with vercel --prod
  6. ✅ Set up Cloudflare R2 bucket for file uploads

What I Learned

The free tier ecosystem in 2026 is incredible. Tools like Supabase and Vercel have made it possible for solo developers to build and ship products that would have required a team and thousands in infrastructure costs just a few years ago.

And with MonkeyCode handling the AI-assisted coding locally, I didn't need to pay for any AI API either.

What free tools are you using in your stack? Drop a comment below — I'd love to add more to this list. 👇

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