SaaS Starter

An open-source, modular SaaS starter built with Next.js 16, Better Auth, Drizzle, Neon and Stripe. Everything you usually rebuild on day one — auth, organizations, subscriptions, an admin panel, docs, a blog and a changelog — is here, and every part of it can be switched off or deleted for good.

• Modular: each module is a flag in config/features.ts. Switch it off and its routes 404, its links disappear and its endpoints are refused. Delete it with one command.
• Typed end to end: TypeScript, Drizzle schema, Zod validation, server actions.
• Ready to charge: Stripe Checkout, customer portal, webhooks, plan prices read from Stripe.

Need onboarding, teams, seat-based billing and transactional emails? Get Pro — $99 early bird until Oct 12 (then $149), one-time payment. See Pro version.

https://github.com/user-attachments/assets/6e002fc2-5adf-458d-9f42-442746d82a60

Stack

Layer	Choice
Framework	Next.js 16 (App Router, Turbopack)
Database	Neon Postgres + Drizzle ORM
Auth	Better Auth (Google, organizations)
Payments	Stripe (Checkout, customer portal, webhooks)
UI	Tailwind CSS v4, shadcn/ui, Base UI
Content	MDX with Fumadocs (docs, blog, changelog, legal pages)

Modules

• auth — Google sign-in and the dashboard: /login, /register, /dashboard. Requires Database and Auth.
• billing — subscriptions and customer portal: /pricing, /dashboard/billing. Depends on auth, requires Payments.
• admin — user management for platform admins: /admin. Depends on auth.
• docs — MDX documentation: /docs.
• blog — MDX articles with authors and categories: /blog.
• changelog — product updates on a single page: /changelog.

A module stays off while a module it depends on is off, or while a service it requires misses its environment variables. In development, the flag button in the bottom-right corner shows the state of everything; in production, set default: false on the module in config/features.ts and rebuild.

Don't need a module at all?

pnpm modules:prune blog changelog

Without --yes, the command only prints what it would delete: routes, components, content, packages, plus any link left pointing at a removed route.

Getting started

npx create-next-app my-saas --example "https://github.com/mickasmt/next-saas-stripe-starter"
cd my-saas
pnpm install
cp .env.example .env.local

Fill in what you need — nothing has to be complete on the first run, since a module stays off until its services are configured. Then apply the migrations and start the app:

pnpm db:migrate
pnpm dev

To test subscriptions locally, forward Stripe events in a second terminal:

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

The full setup — Stripe products and prices, Google OAuth, deployment — is documented in /docs, or in content/docs.

Project structure

app/            Routes: (marketing), (auth), (app), (docs), api
components/     UI and feature components
config/         Site, features, foundation, navigation
content/        MDX: docs, blog, changelog, legal
lib/            Auth, database, content sources, feature resolution
modules/        Server logic of the feature modules
drizzle/        Migrations

Scripts

Command	What it does
pnpm dev	Start the dev server
pnpm build	Production build
pnpm typecheck / pnpm lint / pnpm format	Types, linting, formatting
pnpm db:generate / pnpm db:migrate / pnpm db:studio	Drizzle migrations and studio
pnpm modules:prune <module...>	Delete a module for good

Metadata and SEO

Titles, descriptions, canonical URLs and social cards come from lib/metadata.ts; the site-wide card is generated in app/opengraph-image.tsx. app/sitemap.ts lists the public pages of the enabled modules, and app/robots.ts keeps the dashboard and API out of search results. Set NEXT_PUBLIC_APP_URL to your domain so every absolute URL is right.

Pro version

A paid version adds what comes after launch — onboarding, transactional emails, team management and seat-based billing — on the same foundation. It isn't part of this repository; every "About Pro" link in the app points back to this section.

Get Pro — $99 early bird until Oct 12 (then $149), one-time payment, no subscription.

What's included

• Onboarding — a guided, full-screen first-run flow with its own routes, saved and resumed per member.
• Teams and roles — invite by email, accept in one click, assign owner, admin or member. Every page and action checks the role.
• Seat-based billing — charge per member with Stripe. Seats follow invites and removals, prorations handled automatically.
• Transactional emails — welcome, magic link, team invite, receipt, trial ending: React Email templates sent through Resend.
• Account security — two-factor authentication and session revocation.
• Admin panel — real user management: roles, bans and logging in as a user.
• Error monitoring — Sentry wired for server and client errors.
• SEO — metadata, JSON-LD, sitemap and Open Graph images.
• Installs like any other module — Pro modules show up in the same dev panel and prune with the same command.

Free vs Pro

Feature	Free	Pro
Modules, dev panel and prune command	✅	✅
Auth with organizations (Better Auth)	✅	✅
Stripe subscriptions and customer portal	✅	✅
Admin panel	✅	✅
Docs, blog and changelog	✅	✅
Guided onboarding flow	—	✅
Team invitations, roles and permissions	—	✅
Seat-based team billing	—	✅
Transactional email templates via Resend	—	✅
Error monitoring with Sentry	—	✅
SEO: metadata, JSON-LD and sitemap	—	✅
Private repository and lifetime updates	—	✅

Pricing

$99 early bird until Oct 12, then $149. One-time payment, no subscription. Get Pro

The dashboard previews those features on locked pages: sample data, inert controls and an "About Pro" banner. When you ship your own product, delete components/dashboard/pro, the routes that use it and the pro: true nav items in config/nav.ts.

License

MIT — see LICENSE.md.