Proof, not promises
Every server function authorizes itself
This is shipped kit code, not pseudocode: composable middleware makes authentication, admin checks, and organization scoping the default on every server function.
export const updateOrganizationNameFunction = createServerFn({ method: 'POST' })
.middleware([errorMiddleware, authMiddleware])
.validator(UpdateOrganizationNameSchema)
.handler(async ({ data }) => {
const organizationId = await requireActiveOrganizationId();
const service = createUpdateOrganizationService();
await service.updateOrganization({
organizationId,
name: data.name,
});
});packages/organization · shipped in the kit (Drizzle variant). The full wiring is documented in Better Auth on TanStack Start.
TanStack Start or Next.js? An honest comparison
| MakerKit for TanStack Start | MakerKit for Next.js | |
|---|---|---|
| Routing | TanStack Router: typed routes, params, and search state | App Router: React Server Components and conventions |
| Server logic | createServerFn with composable auth middleware | Server Actions and Route Handlers |
| Build & deploy | Vite + Nitro: portable Node bundle, Railway config included, runs on any Node host | Next.js build: first-class on Vercel, adapters elsewhere |
| Framework maturity | Release Candidate: kit isolates the integration points | Stable, mature ecosystem |
| Data layer | Drizzle, Prisma, or Supabase | Supabase, Drizzle, or Prisma |
Same SaaS architecture on both frameworks. The full comparison lives in TanStack Start vs Next.js.
What ships in the box
apps/
web/ # the TanStack Start application
e2e/ # Playwright end-to-end tests
packages/
better-auth/ # Better Auth integration (Supabase variant: packages/supabase)
account/ # personal account: settings, profile, deletion
organization/ # team accounts, members, invitations
rbac/ policies/ # roles and permission boundaries
billing/ # Stripe billing and gateway
database/ # Drizzle schema (Prisma / Supabase in those variants)
function-middleware/ # auth, admin, and organization middleware
ui/ i18n/ mailers/ monitoring/ analytics/ ...Core flows tested end to end
A dedicated Playwright suite exercises the flows your business depends on:
auth/auth.spec.tsbilling/org-billing.spec.tsbilling/user-billing.spec.tsmembers/members.spec.tsinvitations/invitations.spec.tsadmin/impersonation.spec.tsroles/roles.spec.ts
TanStack Start 1.168 · React 19.2 · Vite 8 · Better Auth (Drizzle/Prisma variants) or Supabase Auth (Supabase variant) — verified July 2026. TanStack Start is currently a Release Candidate: the kit isolates framework integration points, so upstream changes stay contained as it moves to stable.
Ship a SaaS with the best SaaS starter kit for TanStack Start
The best SaaS Starter Kit built with TanStack Start, Better Auth, and Drizzle or Prisma
Skip months of setup and ship your SaaS faster than ever.Complete authentication, subscription management, and multi-tenancy on a full-stack React stack. Deploy anywhere with Vite and Nitro, with no framework lock-in.Built with TanStack Start, TanStack Router, and Better Auth. Choose Drizzle or Prisma as your database layer.
Authentication
Full authentication flow, including password, magic link and social logins, and multi-factor authentication.
Billing and Subscriptions
Manage your billing and subscriptions with Stripe
Customer Portal
Let your users manage their subscription and billing details in the Customer Portal.
Multi Tenancy
Users can belong to multiple organizations and switch between them - or use their personal account.
Super Admin
Manage, Impersonate or Disable your users and organizations within the Super Admin dashboard.
Shadcn UI and Tailwind CSS
The kit includes Shadcn UI, the most popular UI components in the React ecosystem, styled with Tailwind CSS v4.
Dark Theme
Use Dark or Light theme, or let your users choose what they prefer.
Blog
A beautiful Blog that you can use to write about your product and rank higher in search engines.
Documentation/Help Center
Documentation and Help Center to help your users get started with your product, and to answer any questions they may have.
Mobile Friendly
The UI looks great on mobile devices too, so you can reach more of your users with ease.
Serverful/Serverless Stack
Our stack is designed to work both serverless and serverful setups out of the box.
Top-notch code quality
All the code is fully-typed with strict Typescript settings and linted with strict ESLint rules. Simple, yet professionally crafted.
E2E Testing with Playwright
We use Playwright to test our code, ensuring that everything works as expected, and make sure bugs don't sneak in again.
Beautiful emails with React.Email
Professionally designed emails with the power of JSX and React.Email. Customize your emails with ease.
Mailers
Integrate any email service you need with Makerkit using a unified API. Supports Resend or Nodemailer (SMTP).
Plugins
Ready-to-use plugins for your SaaS (testimonials, feedback, roadmap, waitlist, etc.)
Maximum Customization
You own all the code, so you can change what you don't like and customize everything you need.
Rich Documentation
The best documentation you can find for a SaaS Starter Kit. Updated frequently and always up-to-date.
SEO-Ready
The SaaS Starter Kit is SEO-Ready out of the box - no extra work required.
No Vendor Lock-in
Our modular architecture allows you to easily switch between different vendors - no lock-in.
AI Agents
Detailed rules for AI Agents to understand the codebase and work with it in a more efficient way.
MCP Server
Turbocharge your AI Agents output quality with our MCP Server
Extensive Course
The Makerkit Course will help you build your SaaS from scratch, from idea to launch. A streamlined and practical approach to become a Pro.
Realtime Notifications (Supabase)
Realtime notifications for your users with Supabase Realtime.
Internationalization
Built-in internationalization support for your SaaS. Translate your SaaS in any language and conquer the world.
Figma UI Kit
Use the included Figma UI Kit to design your SaaS. You're welcome, designers!
Support
Get support from the Makerkit community and the Makerkit team in our Discord.
Community
Join the Makerkit community to share your projects, ask for help, suggest changes and features, and get inspired.
Content
We release content regularly to help you build your SaaS faster.
Daily Updates
The Makerkit is updated daily with new features, bug fixes and improvements.
Long-Term Vision
Makerkit is a long-term project, and is not going to disappear after a few months like other SaaS boilerplates. We're here to stay and help you build your SaaS.
Here to stay
Makerkit has been around since 2022 and has been used by thousands of developers to build their SaaS. Not a weekend project, but a real business.
Dedicated rules for AI Agents and IDEs
Integrates seamlessly with AI Agents and IDEs like Claude Code, Codex, Gemini, and Cursor
Makerkit's codebases make development faster with custom rules and an MCP Server that help AI Agents and editors write code faster.
Get started in minutes, ship in days
Production Ready TanStack Start SaaS Starter KitAll the tools and resources you need to launch your SaaS in days.
Authentication made easy
AuthenticationFull authentication flow, including password, magic link and social logins.
Multi-tenant SaaS from day one
Multi-TenancyOrganizations, invitations, RBAC. All figured out for you.
Get Paid
BillingSubscriptions with Stripe, including per-seat and metered billing.
Manage accounts from the Super Admin panel
Admin PanelManage your users, organizations, and build your own internal tooling within the app.
Pixel-Perfect UI
Delightful UIEvery pixel crafted with care to make your SaaS look and feel amazing.
Marketing, SEO, and Content
MarketingGet found by your target audience with blog, documentation, changelog, and more.
Debug and Test your SaaS
Monitoring and TestingComprehensive monitoring and testing tools to help you keep your SaaS running smoothly.
Makerkit's true magic: the community 💚
Support and Community As a member of our community, you'll have access to support from me as well as the entire Makerkit community.
Focus on your product, not infrastructure
Skip months of setup with TanStack Start and Better Auth
See how much time you save by starting with a production-ready foundation instead of building everything from scratch.
| Component | Build Yourself | With MakerKit |
|---|---|---|
| Authentication (email, OAuth, MFA) | 2-4 weeks | Pre-built |
| Stripe subscription billing | 2-3 weeks | Pre-built |
| Multi-tenant organizations | 3-4 weeks | Pre-built |
| Role-based access control | 1-2 weeks | Pre-built |
| Super admin dashboard | 2-3 weeks | Pre-built |
| Team invitations & management | 1-2 weeks | Pre-built |
| Transactional emails | 1 week | Pre-built |
| Blog & documentation CMS | 1-2 weeks | Pre-built |
| Dark mode & theming | 3-5 days | Pre-built |
| Responsive UI components | 2-3 weeks | Pre-built |
| Next.js/React version upgrades | Ongoing (2-4 weeks/year) | Included |
| Security patches & fixes | Ongoing (unpredictable) | Included |
| Dependency updates | Ongoing (1-2 weeks/year) | Included |
| New features & best practices | Your time to research & implement | Included |
Build from scratch
2-4 months (typical)
80-150 hours of development
With MakerKit
Day 1
Start building features immediately
Estimated savings
$12,000 - $22,500 (estimated)
In developer time and opportunity cost
What makes MakerKit different
The TanStack Start SaaS Starter Kit built for production
MakerKit provides a battle-tested foundation so you can focus on what makes your product unique.
Production-Ready
Battle-tested by hundreds of SaaS products in production. Not a weekend project, but a real business since 2022.
AI-Agent Optimized
Custom rules for Claude Code, Cursor, and Codex. MCP server included for enhanced AI assistance.
No Vendor Lock-in
Modular architecture lets you swap auth providers, databases, and payment processors without rewriting your app.
Lifetime Updates
One purchase includes all future updates. Daily improvements, security patches, and new features at no extra cost.
Expert Support
Direct support from the creator in Discord. Not outsourced support, but help from someone who knows the code.
Rich Documentation
400+ pages of documentation covering every feature. Tutorials, guides, and API references included.
How MakerKit Compares
Next.js ties your SaaS to the App Router and its deploy model
TanStack Start deploys anywhere via Nitro, with end-to-end type-safe routing from TanStack Router
Most TanStack Start kits lock you into a single ORM
MakerKit ships Drizzle, Prisma, and Supabase variants on the same architecture, so you pick the data layer
Some kits bolt a separate backend framework onto TanStack Start
MakerKit runs on native TanStack Start server functions, fewer moving parts to learn and maintain
New boilerplates often stall after a few months
MakerKit has shipped and maintained SaaS foundations since 2022, with updates across every stack
Ship your SaaS in a week, not months.
- Lifetime access to your stack of choice
- Build unlimited applications
- Continuous updates
- Access to the Discord community
- The best support in the SaaS Starter kits market, period.
- Community and Chat support
- Community-based feature requests and Request for Comments. You have a say in what Makerkit should build next.
- One-time payment, no subscriptions
- Includes access to our free Figma UI kit
Choose your Stack
Select the technology stack that best fits your project
Do you need any clarifications?
Check out the FAQ for more information about Makerkit, or contact me.
Some of the projects built with Makerkit
Below are some of the SaaS projects that have been built with our SaaS Starter kits.
Have you published your Makerkit SaaS?
Let me know, and I will post it here!
Ciao, my name is Giancarlo 👋 I'm Makerkit’s full-time builder.
I help founders launch faster - because life’s too short to write boilerplate code.
I help founders launch faster - because life’s too short to write boilerplate code.
I am a software engineer with almost 15 years of experience writing code for both startups and enterprises.
My love for creating digital products inspired me to build Makerkit, a SaaS Starter Kit that helps you launch the SaaS you have always dreamed of.
My job is to help you achieve your goals, and I work hard to make it happen.
You can find me on Twitter, LinkedIn, and GitHub.