Free Next.js Boilerplate 2026: Open Source Options

TL;DR

The best free Next.js boilerplates in 2026:

• T3 Stack — best TypeScript architecture, largest community, auth + DB only (no billing)
• Open SaaS (Wasp) — most features at $0: admin, analytics, file uploads, billing
• Next SaaS Starter — clean App Router template with Stripe and Neon Postgres
• Nextacular — only free option with multi-tenancy and team management
• create-t3-turbo — T3 extended to a web + mobile monorepo with Expo

None of the free options match the feature depth of $299 commercial boilerplates. But three of them are genuinely production-ready starting points, not just toys.

Feature Comparison

Boilerplate	Stars	Auth	Billing	Admin	Multi-tenancy	Last Updated
T3 Stack	26K	NextAuth	❌	❌	❌	Active
Open SaaS	8K	Wasp Auth	Stripe	✅	❌	Active
Next SaaS Starter	8K	Auth.js	Stripe	❌	❌	Active
Nextacular	3K	NextAuth	Stripe	❌	✅	Maintained
create-t3-turbo	5K	NextAuth	❌	❌	❌	Active

T3 Stack — Best TypeScript Architecture

Stars: 26K+ | License: MIT | Created by: Theo Browne et al.

T3 Stack is the most-starred Next.js boilerplate on GitHub and the gold standard for TypeScript full-stack architecture. The core insight: tRPC, Prisma, and React Query should share a single type system so your database schema change surfaces as a TypeScript error in your frontend component — not a runtime crash in production.

// End-to-end type safety: rename "title" in Prisma schema,
// TypeScript immediately flags this usageQuery call as broken
const { data } = api.post.list.useQuery();
// data.title ← this type-checks against your Prisma schema

What's included: create-next-app scaffolding with TypeScript strict mode, tRPC for type-safe API routes, Prisma for database (any SQL DB), Auth.js v5 (formerly NextAuth) for authentication, and Tailwind CSS. That's it — deliberately.

What's not included: billing integration, admin dashboard, email service, multi-tenancy. T3 is a foundation you build on, not a product you launch from. The create-t3-app CLI lets you opt into each piece at project creation, but it won't wire up Stripe for you.

The 26K+ stars translate to a proportionally active community: the official Discord is one of the most helpful in Next.js development, and the ecosystem of T3-adjacent tooling (T3 Env for environment variables, T3 Turbo for monorepos) continues to expand.

Use T3 Stack if: You want maximum TypeScript DX and you're building SaaS features yourself, or you're building something non-standard where commercial boilerplates would be in the way.

Open SaaS — Most Features at Zero Cost

Stars: 8K+ | License: MIT | Framework: Wasp (compiles to React + Node.js)

Open SaaS by the Wasp team is the most feature-complete free boilerplate — but you're writing Wasp, not pure Next.js. Wasp is a full-stack DSL that compiles down to React + Express. The tradeoff for everything being pre-built is framework lock-in.

The feature list for $0 is remarkable:

• Admin dashboard with user management, subscription metrics, and daily stats
• Stripe subscriptions with webhook handling (paid/free tiers pre-configured)
• File uploads via AWS S3 with pre-signed URLs
• Email campaigns via Mailgun or SendGrid
• Analytics integration pre-wired
• Cron jobs declared in the Wasp config file
• Plausible analytics integration

// Open SaaS: Wasp config declares everything:
app OpenSaaS {
  title: "My SaaS",
  db: { system: PostgreSQL },
  auth: {
    userEntity: User,
    methods: { usernameAndPassword: {}, google: {} },
  },
  emailSender: { provider: Mailgun }
}

route DashboardRoute { path: "/dashboard", to: Dashboard }
page Dashboard { authRequired: true, component: import Dashboard from "@client/pages/Dashboard" }

The Wasp team maintains Open SaaS actively and ships features faster than any volunteer-maintained boilerplate. The trade-off is a smaller ecosystem and the constraint that if you need something Wasp doesn't support, you're working around the framework.

Use Open SaaS if: You want maximum features for free and are comfortable learning Wasp's patterns.

Next SaaS Starter — Clean App Router Baseline

Stars: 8K+ | License: MIT | Created by: Lee Robinson / Vercel community

The cleanest pure Next.js App Router boilerplate for SaaS. No framework magic, no additional DSL — just Next.js App Router, Stripe, Postgres (Neon-compatible), and Auth.js v5.

What makes it production-ready rather than just a tutorial: correct @supabase/ssr patterns for server component auth, proper Stripe webhook handler with idempotency, and TypeScript types throughout. No client-side data fetching in server components, no use client directives where they don't belong.

// Next SaaS Starter — correct App Router auth middleware:
// middleware.ts
import { auth } from './auth';

export default auth((req) => {
  const isLoggedIn = !!req.auth;
  const isProtectedRoute = req.nextUrl.pathname.startsWith('/dashboard');

  if (isProtectedRoute && !isLoggedIn) {
    return Response.redirect(new URL('/login', req.url));
  }
});

export const config = {
  matcher: ['/((?!api|_next/static|_next/image|favicon.ico).*)'],
};

What's missing: admin dashboard, multi-tenancy, email service beyond transactional auth emails, and i18n. This is a clean starting point, not a full product.

Use Next SaaS Starter if: You want idiomatic Next.js App Router patterns with Stripe and auth wired correctly, and you'll build product features from this baseline.

Nextacular — Only Free Multi-Tenancy

Stars: 3K | License: MIT | Architecture: Single Next.js app

The only free boilerplate with genuine multi-tenancy. Nextacular implements subdomain-based workspace isolation: each team gets their own subdomain (team.yourapp.com), and a middleware layer routes requests to the correct tenant context.

The team invitation flow handles the edge cases that trip up custom implementations: tokenized email invites, role assignment on acceptance, duplicate invite prevention, and a member management UI with role changing and removal.

// Nextacular workspace middleware:
export function middleware(req: NextRequest) {
  const hostname = req.headers.get('host');
  const subdomain = hostname?.split('.')[0];

  if (subdomain && subdomain !== 'www' && subdomain !== 'app') {
    // Rewrite to /[workspace]/[...path] internally
    return NextResponse.rewrite(
      new URL(`/${subdomain}${req.nextUrl.pathname}`, req.url)
    );
  }
}

What it's missing vs. paid alternatives: per-seat billing (manual implementation required), RBAC beyond basic admin/member, custom domain support. Functional multi-tenancy at zero cost, not enterprise-grade multi-tenancy.

Use Nextacular if: Your SaaS needs B2B teams on a zero budget.

create-t3-turbo — Web + Mobile Monorepo

Stars: 5K | License: MIT | Architecture: Turborepo monorepo

create-t3-turbo extends the T3 Stack to a Turborepo monorepo with three apps: a Next.js web app, an Expo React Native mobile app, and a shared API package using tRPC. The key value proposition: one tRPC router definition is consumed by both web and mobile with full type safety.

apps/
  nextjs/          ← Next.js App Router app
  expo/            ← Expo React Native app
packages/
  api/             ← tRPC routers (shared by both apps)
  db/              ← Prisma schema and client
  auth/            ← Auth.js configuration
  ui/              ← Shared React Native + web components

The architectural beauty: if you define a new API route in packages/api, it's immediately available with correct TypeScript types in both the Next.js app and the Expo app. No API contract duplication, no manual sync.

The overhead: Turborepo has a learning curve, and running the full dev environment (two apps + API) takes more memory and more commands than a single Next.js app. Worth it if and only if you actually need mobile.

Use create-t3-turbo if: You need web + iOS/Android from the same codebase with TypeScript type sharing.

When to Pay for a Commercial Boilerplate

Free boilerplates are genuinely good enough for:

• TypeScript foundations you'll build on heavily
• B2C products without team/organization features
• Prototypes and internal tools where you control the users

The gap appears at: multi-tenancy with per-seat billing, admin dashboards with metric reporting, comprehensive email sequences, and production-grade auth beyond basic sessions. Building these from T3 Stack takes 4–8 weeks of engineering time. At $299, Supastarter or Makerkit pay for themselves in the first week.

If you're evaluating whether free is actually free, read how much time a SaaS boilerplate saves — the real calculation includes the 200+ hours that billing, admin, and multi-tenancy take to implement correctly.

Summary

Use Case	Recommendation
Best TypeScript DX	T3 Stack
Maximum features at $0	Open SaaS
Clean App Router baseline	Next SaaS Starter
Free multi-tenancy	Nextacular
Web + mobile monorepo	create-t3-turbo
B2B with teams (budget allows)	Supastarter

Browse all free options and compare them in the StarterPick free boilerplate directory. For when you're ready to evaluate paid options, the best Next.js SaaS boilerplate comparison covers the top commercial picks.