Back to Blog
Resources
March 9, 2026

Best Free Next.js SaaS Starter Kits in 2026

A roundup of the best free and open-source Next.js SaaS starter kits available in 2026. Compare features, tech stacks, and find the right one for your project.

By NextUpKit Team•5 min read

Best Free Next.js SaaS Starter Kits in 2026

Building a SaaS from scratch means weeks of setup — authentication, payments, database, email, UI components. That's weeks you could spend building the thing that actually makes your product unique.

SaaS starter kits solve this. And in 2026, you don't need to pay $200-600 for one. Here are the best free Next.js SaaS boilerplates available right now.

Why Use a Starter Kit?

Before the list, let's be clear about what you're getting. A good SaaS starter kit saves you from building:

  • Authentication — Sign up, sign in, OAuth providers, magic links, session management
  • Payments — Subscription billing, one-time purchases, customer portal
  • Database — Schema design, ORM setup, migrations
  • Email — Transactional emails, templates
  • UI — Component library, responsive layout, dark mode
  • SEO — Meta tags, sitemap, Open Graph images
  • Analytics — Page views, user behavior tracking

Building all of this from scratch takes 4-8 weeks. A starter kit gives it to you in minutes.

1. NextUpKit (Recommended)

nextupkit.com

NextUpKit is a free, open-source Next.js SaaS starter kit that was previously a paid product. It went fully open source in February 2026.

Tech Stack:

  • Next.js + TypeScript
  • NextAuth (Google, Facebook, Magic Links)
  • MongoDB + Prisma ORM
  • LemonSqueezy (payments)
  • Resend (email)
  • shadcn/ui + Tailwind CSS
  • Google Analytics + Microsoft Clarity
  • Crisp (live chat)

Why we like it:

  • Complete SaaS foundation — Everything you need to launch is included
  • Modern component library — shadcn/ui is the best React component system right now
  • Microsoft Clarity — Free session recordings and heatmaps, most starter kits don't include this
  • Live chat — Crisp integration lets you talk to your first users immediately
  • Well-structured — Clean code, clear file organization, easy to customize
  • Active development — Community-driven with regular updates

Best for: Solo developers, indie hackers, students, and anyone who wants a complete SaaS foundation without paying a dime.

git clone https://github.com/nextupkit/nextupkit.git
cd nextupkit && npm install && npm run dev

2. Next.js SaaS Starter (Vercel)

Vercel's official SaaS template provides a minimal starting point built on Next.js.

Tech Stack:

  • Next.js
  • NextAuth or Clerk
  • PostgreSQL (via Vercel Postgres or Neon)
  • Stripe
  • Tailwind CSS

Why we like it:

  • Backed by the Next.js team
  • Clean, minimal implementation
  • Good learning resource

Limitations:

  • Very minimal — less "starter kit" and more "template"
  • Fewer built-in features compared to dedicated SaaS kits
  • You'll need to add a lot yourself

Best for: Developers who want maximum control and a minimal starting point.

3. SaaS Boilerplate (Open Source)

There are several community-driven open-source SaaS boilerplates on GitHub with varying levels of completeness.

Common Tech Stacks:

  • Next.js + Supabase
  • Next.js + Prisma + PostgreSQL
  • Next.js + Firebase

Why they can be good:

  • Free and open source
  • Community contributions
  • Good for learning

Limitations:

  • Quality varies significantly
  • Many are abandoned or poorly maintained
  • Documentation is often lacking
  • May not be production-ready

Best for: Developers who enjoy piecing things together and learning from different approaches.

How to Choose

Here's a simple decision framework:

If you want... Choose
Complete, production-ready kit NextUpKit
Minimal starting point Vercel SaaS Starter
Maximum customization Roll your own from community templates
MongoDB + Prisma NextUpKit
PostgreSQL + Supabase Community boilerplates

What About Paid Alternatives?

Paid starter kits like ShipFast ($199-$299), MakerKit ($299-$599), and Supastarter ($299) offer more features in some areas — particularly multi-tenancy, internationalization, and testing. But for most projects, especially early-stage ones, a free starter kit covers everything you need.

We've written detailed comparisons if you want to dig deeper:

Tips for Getting the Most Out of a Starter Kit

  1. Don't customize everything on day one — Start building your core feature immediately. Tweak the boilerplate later.
  2. Keep the auth simple — Don't add 5 OAuth providers at launch. Google + email is enough for most products.
  3. Set up analytics early — You need to understand user behavior from the first visitor.
  4. Deploy immediately — Don't wait for the product to be "done." Deploy the starter kit as-is and iterate in production.
  5. Focus on your unique value — The starter kit handles the generic SaaS stuff. Spend your time on what makes your product different.

Getting Started

If you're ready to build, here's the fastest path:

  1. Clone NextUpKit
  2. Set up your environment variables (database, auth, payments)
  3. npm run dev
  4. Start building your unique feature

You'll have a fully functional SaaS running locally in under 10 minutes. No payment, no signup, no license key.

Get NextUpKit →