The Modern SaaS Tech Stack in 2025: What Actually Matters

Every week someone asks me: "What stack should I use for my SaaS?"

My answer used to be complicated. Now? It's boring. And that's exactly why it works.

The Stack That Ships

Here's what I use for every SaaS product I build:

Frontend: Next.js 15 + React 19 + TypeScript Backend: Next.js API Routes (yes, same framework) Database: PostgreSQL via Supabase Auth: Supabase Auth Payments: Stripe Storage: Supabase Storage (S3-compatible) Email: Resend + React Email Hosting: Vercel Styling: Tailwind CSS + shadcn/ui

Boring? Absolutely. Effective? Completely.

Why This Stack Wins

Next.js: The Obvious Choice

App Router. Server Components. Server Actions. Edge Runtime. Next.js 15 isn't just a React framework anymore—it's a full-stack platform.

The mental model is simple: pages are components, data fetching is built in, and deployment is one command.

You can build everything from a landing page to a complex B2B SaaS without leaving the framework.

Supabase: PostgreSQL Without the Pain

Real talk: most SaaS products need a relational database. NoSQL is great until you need to JOIN three tables and suddenly you're writing aggregation pipelines that would make a senior DBA cry.

Supabase gives you:

Real PostgreSQL (not some watered-down cloud version)
Row Level Security (your users can't see each other's data)
Realtime subscriptions (for that live update feeling)
Built-in auth (OAuth, magic links, the works)
S3-compatible storage (files handled properly)

And it's all managed. No DevOps PhD required.

TypeScript: Non-Negotiable

If you're building a SaaS in JavaScript without types in 2025, you're either extremely confident or extremely new.

TypeScript catches bugs before your users do. The autocomplete alone saves hours. The refactoring confidence is priceless.

Plus, every modern library has TypeScript support now. Fighting it is fighting the ecosystem.

Stripe: Just Pay the 2.9%

I've seen developers spend weeks building custom payment systems to "save on fees."

Don't.

Stripe handles:

PCI compliance
International payments
Currency conversion
Subscription management
Invoice generation
Tax calculation
Fraud prevention

Your time is worth more than 2.9%.

Tailwind + shadcn/ui: Design System in a Box

Tailwind lets you move fast. shadcn/ui gives you beautiful components you actually own.

No fighting with Material UI's opinions. No wrestling with Bootstrap's 2012 aesthetic.

Copy a component, customize it, ship it. Done.

What About the AI Layer?

Here's where 2025 is different: AI isn't optional anymore.

Every SaaS needs:

An AI chat interface (users expect it)
Smart document processing
Automated workflows
Content generation

Supporting multiple providers (OpenAI, Claude, DeepSeek) isn't about being fancy—it's about not being locked in when pricing changes or a provider has downtime.

Our boilerplate has multi-provider AI support built in. Same interface, swap the provider, keep shipping.

What This Stack Doesn't Include

No microservices. No Kubernetes. No GraphQL. No serverless functions spread across 14 repos.

Not because they're bad—because you don't need them yet.

When you hit 100K users and have real scaling problems, you'll have revenue to hire the right talent. Until then, this stack handles millions of requests just fine.

The Real Secret

The best tech stack is the one that:

You understand completely
Has great documentation
Ships fast
Scales when needed

This stack checks all four boxes.

Ready to Build?

I've packaged this entire stack into a production-ready boilerplate. Authentication configured. Payments integrated. AI ready to go. Database migrations set up.

Everything you see here, ready to deploy.

Join the waitlist and get $50 off when we launch.

Because the best time to start building was yesterday. The second best time is now.