How to Build and Launch a SaaS for $0 in 2026

In 2026, you can build and launch a real SaaS product for $0. Here's exactly how. The Free Stack Frontend Vercel — free hosting, custom domains, SSL Next.js — React framework, free and open source Tailwind CSS — utility-first CSS, free Backend Railway — 500h free/month (enough for a side project) Node.js or Python — your choice Database Neon — serverless PostgreSQL, 512MB free Upstash — serverless Redis, 10,000 commands/day free Authentication Auth.js (NextAuth) — open source, free Clerk — free tier: 10,000 MAU Payments Stripe — 0% platform fee, only pay per transaction (~2.9%) Lemon Squeezy — similar to Stripe, handles EU VAT automatically Email Resend — 3,000 emails/month free Brevo — 300 emails/day free Step-by-Step Launch Guide Week 1: Build the Core Define ONE core feature — what problem do you solve? Set up your stack — Next.js + Neon + Railway Build the MVP — minimum viable product, not maximum Add auth — Clerk or Auth.js Week 2: Polish & Deploy Deploy to Vercel — connect GitHub