Best Open-Source Next.js SaaS Boilerplate Picks for 2026: 5 Starter Kits to Ship Faster

A good Next.js SaaS boilerplate hands you the boring 20% of every product — auth, Stripe billing, a database, a dashboard — so you can vibe code the 80% that actually makes your app different. This roundup covers five free, open-source starters worth cloning in 2026, compared by GitHub stars, the exact stack each ships, and who each one is for, so you can pick in five minutes instead of skimming a dozen READMEs.

Why open source over a paid kit? You can read every line, self-host, swap providers, and let an AI agent refactor the whole thing without fighting a license. The trade-off is the usual one: this space moves fast, and a repo that trended last year may be coasting today — so the star counts and stacks below were checked directly on GitHub and are approximate as of July 2026. Always confirm a repo is still maintained before you build a business on it.

The Best Open-Source Next.js SaaS Boilerplates at a Glance

Here's the full lineup, sorted by GitHub stars. Skim the table, then jump to whichever fits your stack and appetite for scope.

1. nextjs/saas-starter — the clean, modern default

nextjs/saas-starter is the most-starred pick here at roughly 15.9k stars and MIT-licensed. It's an intentionally minimal template built around the current Next.js App Router, and it's the one to start with if you want a small, readable codebase rather than a kitchen sink.

The stack it ships: Postgres with the Drizzle ORM, Stripe Checkout plus the Customer Portal for subscriptions, and shadcn/ui components. Auth is a lightweight email/password flow with JWTs stored in cookies, and it includes basic RBAC (Owner/Member roles), protected dashboard routes, and an activity log.

Why it matters to vibe coders: because it's small and un-opinionated, an AI agent can read the entire project into context and reason about it end to end. There's no framework magic hiding the auth or billing logic — it's all right there to modify.

When to pick it: you're starting fresh, you want Drizzle + Stripe wired up correctly, and you'd rather add features than delete them. Clone and set up:

git clone https://github.com/nextjs/saas-starter
cd saas-starter
pnpm install && pnpm db:setup

2. ixartz/SaaS-Boilerplate — the feature-rich free option

ixartz/SaaS-Boilerplate (~7.1k stars, MIT) is the most fully loaded free kit on the list, and one of the few running a recent Next.js line with Tailwind CSS. Its latest tagged release landed in December 2025, so it's actively maintained.

The stack it ships: authentication via Clerk (social login, MFA, passkeys, user impersonation), multi-tenancy with teams, role-based access control, i18n via next-intl, and the Drizzle ORM running against PostgreSQL, SQLite, or MySQL — with PGlite for zero-config local dev. It also bundles Sentry, Storybook, and a full Vitest + Playwright test setup. One honest caveat: Stripe billing lives in the paid Pro tier; the free open-source core focuses on auth, teams, and multi-tenancy.

Why it matters to vibe coders: the multi-tenant + RBAC scaffolding is the part that's genuinely tedious to build and easy to get wrong. Getting it for free is a huge head start on any B2B app.

When to pick it: you're building a team-based SaaS and want organizations, roles, and testing baked in from day one. Get started:

git clone --depth=1 https://github.com/ixartz/SaaS-Boilerplate.git my-saas
cd my-saas
npm install && npm run dev

3. boxyhq/saas-starter-kit — enterprise features out of the box

boxyhq/saas-starter-kit (~4.8k stars, Apache-2.0) is the pick when your buyers have a security questionnaire. It's a mature, battle-tested kit from the BoxyHQ team (the folks behind SAML Jackson) aimed squarely at enterprise-grade requirements.

The stack it ships: NextAuth.js for auth (email/password, magic links, Google, GitHub) plus SAML SSO and SCIM directory sync, Stripe payments, audit logs, webhook orchestration (Svix), team management, RBAC, and i18n — all on PostgreSQL with Prisma and a Docker Compose setup for local development.

Why it matters to vibe coders: SSO, SCIM, and audit logging are exactly the features indie builders skip until an enterprise deal forces a painful retrofit. Starting with them present means you can say "yes" to that first big customer.

When to pick it: you're targeting mid-market or enterprise and need SSO/compliance features early. Spin it up:

git clone https://github.com/boxyhq/saas-starter-kit.git
cd saas-starter-kit
npm install && docker-compose up -d
npx prisma db push && npm run dev

4. async-labs/saas — the classic full-stack workhorse

async-labs/saas (~4.5k stars, MIT) is the veteran of the group — a complete SaaS reference app built to accompany the Builder Book project. It uses a more traditional architecture than the others, which is a feature if you like clarity over abstraction.

The stack it ships: Next.js served through a custom Express server, MongoDB with Mongoose, MobX for state, Material-UI, and WebSockets. Auth is Google OAuth plus passwordless (session/cookie based), payments are Stripe subscriptions with verified webhooks for failed charges, and it includes AWS S3 uploads and SES transactional emails.

Why it matters to vibe coders: it's split cleanly into app and api services, so it's a great template if you want your Next.js frontend and your API server as separate, scalable pieces rather than everything crammed into route handlers.

When to pick it: you prefer a MongoDB + Express backend, or you're learning full-stack patterns and want a real, deployable example. Clone it:

git clone https://github.com/async-labs/saas.git
cd saas/saas/app && yarn install && yarn dev

5. mickasmt/next-saas-stripe-starter — the solo-founder favorite

mickasmt/next-saas-stripe-starter (~3.0k stars, MIT) is a beloved, approachable starter that nails the essentials without overwhelming you. It's built on Next.js 14 and reads like a clean tutorial you can actually ship.

The stack it ships: Auth.js v5 (the library formerly known as NextAuth) with social login, user roles and an admin panel, Stripe subscriptions with a pricing table, Prisma against a serverless Neon Postgres database, Resend + React Email for transactional mail, shadcn/ui, Server Actions, and a Contentlayer-powered MDX blog.

Why it matters to vibe coders: the Resend + React Email integration and the ready-made pricing page cover two things solo founders almost always bolt on late. It's opinionated in the right places and easy for an agent to extend.

When to pick it: you're a solo dev or small team who wants Stripe, Auth.js, and email working today without enterprise ceremony. Scaffold it in one command:

npx create-next-app my-saas --example "https://github.com/mickasmt/next-saas-stripe-starter"

Honorable mentions (and what to avoid)

Two names come up constantly that deserve a caveat. Open SaaS by the Wasp team is a superb, 100% free, MIT-licensed SaaS starter (~14.4k stars) — but it's built on the Wasp full-stack framework and React, not Next.js, so it's out of scope for this list even though it's excellent. And popular paid kits like ShipFast and MakerKit Pro ship polished features and support, but they are commercial, closed-source products, not open-source boilerplates you can freely fork. Great options if you want a license and a Discord — just know what you're buying.

How to Choose Your Next.js SaaS Boilerplate

There's no single winner; the right Next.js SaaS boilerplate depends on your target customer and how much scope you want on day one:

• Starting fresh and want it minimal: nextjs/saas-starter — small, modern, Drizzle + Stripe done right.
• Building a team/B2B product: ixartz/SaaS-Boilerplate for multi-tenancy and RBAC (add Stripe yourself, or upgrade to Pro).
• Selling to enterprises: boxyhq/saas-starter-kit for SSO, SCIM, and audit logs from the start.
• Prefer MongoDB/Express or want a split frontend/API: async-labs/saas.
• Solo founder shipping fast: mickasmt/next-saas-stripe-starter for Stripe + Auth.js + email in one clone.

Whichever you clone, the workflow that turns a boilerplate into a real product is the same: pick the kit whose auth and billing match your needs, wire up your database, then vibe code your differentiator on top. If you want the full path from starter repo to paying customers, read our guide on going from vibe code to cash — and if you'll be building with an AI agent, our roundup of open-source AI coding agents pairs perfectly with any starter here.

Key Takeaway

The open-source Next.js starter kit ecosystem in 2026 is deep enough that you never need to build auth and billing from scratch: nextjs/saas-starter is the clean default, ixartz/SaaS-Boilerplate hands you multi-tenancy for free, BoxyHQ covers enterprise SSO, async-labs/saas is the classic full-stack reference, and mickasmt/next-saas-stripe-starter is the fastest path for a solo founder. Match one to your customer, confirm it's still actively maintained, and you get the speed of vibe coding on a foundation you fully own.

Star counts, licenses, and stacks are approximate and were verified on GitHub in July 2026. This space moves fast — check each repo's latest commits and releases before you commit to it.