Next.js 16 · SaaS Boilerplate
NextStarter Pro is a production-ready Next.js 16 starter with authentication, Stripe payments, a database, email, and a dashboard already wired up plus accessibility verified with automated tests. Go from clone to launch in days, not weeks.
One-time payment · lifetime updates · unlimited projects
Or start with the free versionEverything in the free starter is in Pro too. Pro adds the parts every SaaS ends up building by hand.
| Feature | Free$0 | Pro$199 once |
|---|---|---|
| Next.js 16, TypeScript & Tailwind CSS v4 | Included | Included |
| shadcn/ui components with light & dark theming | Included | Included |
| WCAG 2.1 AA, verified with Axe-core | Included | Included |
| Lighthouse 100/100/100/100 on desktop | Included | Included |
| Playwright E2E, ESLint, Prettier & GitHub Actions CI | Included | Included |
| SEO essentials - robots.txt, sitemap.xml, custom 404 | Included | Included |
| Cookieless PostHog analytics - no cookie banner | Included | Included |
| Authentication with Clerk | Not included | Included |
| Database with Prisma + PostgreSQL | Not included | Included |
| Stripe subscriptions & customer portal | Not included | Included |
| Transactional email with Resend | Not included | Included |
| Dashboard app shell & admin panel | Not included | Included |
| MDX blog & validated contact form | Not included | Included |
| Internationalization - English, Spanish, Arabic (RTL) | Not included | Included |
| Security headers, CSP & API rate limiting | Not included | Included |
| Sentry error tracking | Not included | Included |
Nine integrations, configured and typed — not a list of packages in a manifest. Every one of them is optional and gated by an environment variable, so the app builds, runs, and passes its tests before you sign up for a single service.
Clerk is wired into the App Router, not just installed. Middleware guards the protected route groups, so a signed-out visitor hitting a dashboard URL is redirected rather than served a flash of private UI. Sign-in, sign-up, and the user profile are already built and themed to match the rest of the starter in both light and dark mode.
Because it's env-gated like everything else, the app still builds and runs with no Clerk keys at all — the protected areas simply show a “not configured” notice until you add them.
The database layer is Prisma against PostgreSQL, with a typed schema, migrations, and a generated client ready to go. It ships with a complete user-owned CRUD example — create, read, update, and delete records scoped to the signed-in user — so the ownership checks and the query patterns are demonstrated rather than left as an exercise.
That example is the piece most starters skip. It's the difference between “a database is installed” and “here is how this codebase expects you to read and write data safely.”
Stripe handles subscriptions end to end: Checkout for the purchase, the billing portal for customers to manage or cancel their own plan, and the webhook route that keeps subscription status in sync with your database instead of trusting the browser redirect.
Subscription state is readable from your server components, so gating a feature behind a paid plan is a check, not a rebuild. Test-mode keys work throughout, and with no keys set the billing surfaces stay dormant rather than erroring.
Transactional email is Resend with React Email templates, so your emails are components — typed, reviewable in a pull request, and styled with the same tokens as the app rather than maintained as a separate pile of table-based HTML.
The templates cover the messages an app actually has to send, and the sending helper is a single typed function you call from server actions and route handlers.
A dashboard is where most starters stop at a placeholder. This one ships an app shell — a sidebar that collapses into a responsive drawer, consistent page headers, and protected routing — that you can hang real features on immediately.
On top of that sits an admin panel with metrics and a searchable user table, so you have an operator's view of your own product from day one instead of querying the database by hand when a customer emails you.
Content is an MDX blog: posts are files in the repository, version-controlled alongside your code, with the layout, metadata, and routing already handled. No CMS to provision, and no monthly bill for publishing a changelog.
The contact form is validated with React Hook Form and Zod — one schema shared by the client and the server, so the two can't disagree about what a valid submission is, and the error states are accessible rather than colour-only.
Internationalization is next-intl, configured with English, Spanish, and Arabic — and the Arabic locale is the point. Most boilerplates either skip i18n entirely or add a translation library without ever rendering a right-to-left layout, which is where the actual work is: mirrored navigation, logical CSS properties instead of hard-coded left and right, and icons that flip when direction demands it.
Here the RTL layout is built and tested, routing is locale-aware, and hreflang metadata is emitted for every page so search engines understand which language they're looking at. Adding a fourth language is a message file, not a refactor.
Security is the work nobody demos and everybody needs. Pro ships a Content Security Policy and a set of hardening headers configured for Next.js — tight enough to be worth having, and documented so you know which directive to loosen when you add a third-party script instead of disabling the whole policy.
API routes have rate limiting so a single client can't hammer an endpoint, and user input is sanitized on the way in. All of it is configuration you'd otherwise research on a deadline, after launch.
Error tracking is Sentry, wired for both server and client so a production exception arrives with a stack trace instead of a support ticket that says “it broke.” There's also a waitlist mode for the pre-launch period: flip it on and the app collects email addresses behind a landing page, then flip it off on launch day.
Analytics is the same cookieless PostHog setup the free starter already ships — product analytics without a consent banner as the price of entry — carried across unchanged rather than paywalled. Every integration here is env-gated, so a repository with no keys sends nothing anywhere.
No zip file, no drip-fed course, no seat that expires.
Polar adds you to the private NextStarter Pro repository automatically at checkout. You connect your GitHub account in the customer portal, accept the emailed invitation, and clone — usually within a couple of minutes of paying.
Delivery is through GitHub, not a zip file. Keep NextStarter as a git remote and pull new features and fixes whenever you want them; the CHANGELOG and GitHub Releases record what changed in every version.
A single-developer license covering unlimited personal and commercial projects — client work, side projects, and your own products. You can ship what you build however you like; you just can't redistribute the starter itself.
Setup, a guide for each integration, and deployment walkthroughs for Vercel and for self-hosting. The docs live in the repository, so they're versioned with the code they describe.
Everything buyers ask before they buy. If yours isn't here, just ask — the last answer has the address.
Instant access to the private NextStarter Pro GitHub repository. After checkout you connect your GitHub account in the customer portal, GitHub emails you a collaborator invitation, and accepting it lets you clone the repo and start building — usually within a couple of minutes of paying. Every future update comes with it.
Through GitHub, not a zip. You clone the private repo and pull updates with git. That means you get fixes and new features by running git pull, instead of re-downloading and manually merging a file dump.
Yes — access is granted to your GitHub account. You connect it in the customer portal after checkout, and GitHub emails you a collaborator invitation for the repository.
One-time. You pay once and get lifetime access to the repository and its updates. There are no recurring fees and nothing to cancel.
Yes. A single-developer license covers unlimited personal and commercial projects — build client work, side projects, and your own products with it.
You can ship the apps you build with it however you like. You can't redistribute, resell, or share the starter itself as a template, and each developer needs their own license. Full terms are in the repository's LICENSE.md.
For the lifetime of the product. Pull them anytime with git pull; the CHANGELOG and GitHub Releases track what changed in each version.
You keep NextStarter as a separate git remote and merge updates when you choose. Because you build your app in your own files, merges are usually small — and the repository includes a short guide for doing this cleanly across multiple projects.
Next.js 16 (App Router), TypeScript in strict mode, Tailwind CSS v4, and React 19. Auth is Clerk, the database is Prisma + PostgreSQL, payments are Stripe, email is Resend, analytics is PostHog, and error tracking is Sentry.
Node.js 22 or later, and a GitHub account to receive the repository. Every third-party service is optional, and each one has a generous free tier.
No. Every integration is optional and gated by an environment variable. With no keys, the app builds, runs, and passes its tests — features you haven't configured simply show a tidy “not configured” notice. Turn on only what you need, when you need it.
Yes. Because each integration is self-contained and env-gated, you can leave it off with zero configuration or delete it outright without unravelling the rest of the app.
Anywhere Next.js runs. Vercel is the one-click path, with a walkthrough in the docs, and there's a manual and self-hosted guide too.
Comfort with React and Next.js. If you've built with the App Router before, you'll be productive immediately; the docs cover setup, each integration, and deployment.
It's tested. Every page is scanned with Axe-core in automated tests, in both light and dark mode, and the project targets WCAG 2.1 AA. That matters for government, enterprise, and agency work where accessibility is a requirement — and it's a rare thing to get in a starter at any price.
The free version, NextStarter Lite, is a polished, accessible landing page with testing and tooling. Pro adds the whole SaaS foundation on top — authentication, database, billing, email, a dashboard, admin, i18n, security, and more — so you skip the weeks of plumbing every SaaS repeats.
Yes. Pro is a separate repository rather than an upgrade you apply in place, so nothing you've already built on the free starter is wasted — the conventions, tooling, and structure are the same, and you move your own files across.
There's a 14-day money-back guarantee. If NextStarter Pro isn't a fit, email within 14 days of your purchase and you'll get a full refund — repository access is simply revoked.
Email support@nextstarter.app and you'll get a reply before you buy. Happy to answer anything that isn't covered here.
Authentication, a database, payments, email, a dashboard, an admin panel, i18n with RTL, and security — wired up, typed, and tested for accessibility.
$199 one-time · lifetime access
14-day money-back guarantee · unlimited projects · no subscription
Still deciding? Email support@nextstarter.app with any question, or start with the free version and upgrade later.