Next.js SaaS Starter

This is a starter template for building a SaaS application using Next.js with support for authentication, Stripe integration for payments, and a dashboard for logged-in users.

Demo: https://next-saas-start.vercel.app/

Why did I make this?

In 2020, I made a course called "React 2025" which showed how to build a SaaS application with Next.js, Stripe, and other tools.

Well, it's almost 2025 and React 19 has brought so many amazing new features I didn't predict! This repo is a demonstration of the latest React and Next.js patterns. These patterns can drastically simplify some common tasks in building your SaaS, like building forms, talking to your database, and more.

For example, React now has built in hooks like useActionState to handle inline form errors and pending states. React Server Actions can replace a lot of boilerplate code needed to call an API Route from the client-side. And finally, the React use hook combined with Next.js makes it incredibly easy to build a powerful useUser() hook.

We're able to fetch the user from our Postgres database in the root layout, but not await the Promise. Instead, we forward the Promise to a React context provider, where we can "unwrap" it and awaited the streamed in data. This means we can have the best of both worlds: easy code to fetch data from our database (e.g. getUser()) and a React hook we can use in Client Components (e.g. useUser()).

Fun fact: the majority of the UI for this application was built with v0 🤯 More details here if you want to learn about this repo.

Features

Marketing landing page (/) with animated Terminal element
Pricing page (/pricing) which connects to Stripe Checkout
Dashboard pages with CRUD operations on users/teams
Basic RBAC with Owner and Member roles
Subscription management with Stripe Customer Portal
Email/password authentication with JWTs stored to cookies
Global middleware to protect logged-in routes
Local middleware to protect Server Actions or validate Zod schemas
Activity logging system for any user events

Tech Stack

Framework: Next.js
Database: Postgres
ORM: Drizzle
Payments: Stripe
UI Library: shadcn/ui

Getting Started

git clone https://github.com/leerob/next-saas-starter
cd next-saas-starter
pnpm install

Running Locally

Use the included setup script to create your .env file:

pnpm db:setup

Then, run the database migrations and seed the database with a default user and team:

pnpm db:migrate
pnpm db:seed

This will create the following user and team:

User: test@test.com
Password: admin123

You can, of course, create new users as well through /sign-up.

Finally, run the Next.js development server:

pnpm dev

Open http://localhost:3000 in your browser to see the app in action.

Optionally, you can listen for Stripe webhooks locally through their CLI to handle subscription change events:

stripe listen --forward-to localhost:3000/api/stripe/webhook

Testing Payments

To test Stripe payments, use the following test card details:

Card Number: 4242 4242 4242 4242
Expiration: Any future date
CVC: Any 3-digit number

Going to Production

When you're ready to deploy your SaaS application to production, follow these steps:

Set up a production Stripe webhook

Go to the Stripe Dashboard and create a new webhook for your production environment.
Set the endpoint URL to your production API route (e.g., https://yourdomain.com/api/stripe/webhook).
Select the events you want to listen for (e.g., checkout.session.completed, customer.subscription.updated).

Deploy to Vercel

Push your code to a GitHub repository.
Connect your repository to Vercel and deploy it.
Follow the Vercel deployment process, which will guide you through setting up your project.

Add environment variables

In your Vercel project settings (or during deployment), add all the necessary environment variables. Make sure to update the values for the production environment, including:

BASE_URL: Set this to your production domain.
STRIPE_SECRET_KEY: Use your Stripe secret key for the production environment.
STRIPE_WEBHOOK_SECRET: Use the webhook secret from the production webhook you created in step 1.
POSTGRES_URL: Set this to your production database URL.
AUTH_SECRET: Set this to a random string. openssl rand -base64 32 will generate one.

Other Templates

While this template is intentionally minimal and to be used as a learning resource, there are other paid versions in the community which are more full-featured:

Darlley / next-saas-starter