Fastack: Scalable, secured, production-ready SaaS NextJS boilerplate

A scalable, secured, production-ready SaaS boilerplate with solid foundations built for developers.

After building multiple SaaS applications from scratch, I kept spending weeks, sometimes months, setting up the same foundational features: authentication with OAuth, email verification, password resets, Stripe integration, admin panels, contact systems, GDPR compliance, i18n, and more. Each time, I'd think "surely there's a better way." The breaking point came when I realized I was spending more time on infrastructure than on the actual product features that mattered to users. I saw other developers facing the same challenge, founders stuck in setup instead of building their vision. That's when I decided to build Fastack: a production-ready SaaS boilerplate that handles the essential infrastructure so developers can focus on what makes their product unique. The problem is simple but costly: building a production-ready SaaS application requires 100+ hours of setup work before you can start building your core features. Most developers either: - Build everything from scratch (wasteful and error-prone) - Use incomplete boilerplates (missing critical features) - Pay for expensive solutions that lock you into specific architectures Fastack solves this by providing: - Complete authentication (NextAuth.js v5, OAuth, email verification) - Stripe subscription management (checkout, webhooks, customer portal) - Admin dashboard with contact management - GDPR-compliant cookie consent - Multi-language support (i18n) - Progressive Web App (PWA) capabilities - Analytics integration (PostHog, Google Analytics, Axiom) - Type-safe everything (TypeScript strict mode) - Modern monorepo architecture (Turborepo) All built with Next.js 14 App Router, Prisma, and HeroUI v3, the stack that scales. The journey started as a simple starter template, but quickly evolved into something more ambitious. Today, Fastack isn't just a boilerplate, it's a complete SaaS foundation that saves developers 100+ hours of setup time. It's the result of countless iterations, real-world testing, and a commitment to building something that actually solves a real problem. The best part? Every feature in Fastack is something I've needed in production. Nothing is theoretical, it's all battle-tested.