SaasStinger Lite

Over the past few weeks, I built SaaSStinger Lite — a production-ready SaaS starter for developers who build with Next.js + Firebase.

The reason I made it was simple: every time I start a new SaaS, I end up rebuilding the same core infrastructure before I can even focus on the actual product.

The parts that usually take the most time are not the UI.
It is the application architecture:

• authentication

• user profiles

• workspaces

• memberships

• roles

• RBAC

• invitations

• audit logs

• usage tracking

• workspace settings

• Firestore security rules

For SaaSStinger Lite, I tried to treat those as real product infrastructure, not just starter-kit features.

What it includes

• Next.js 16

• React 19

• TypeScript

• Firebase Authentication

• Cloud Firestore

• multi-workspace architecture

• OWNER / ADMIN / MEMBER roles

• invitation flow

• audit logs

• usage tracking

• service-layer structure

• production documentation

• Firebase-first architecture

One of the main things I cared about was keeping it compatible with the Firebase Spark plan.

I wanted it to be useful for developers who want to start building without immediately needing to add Cloud Functions or move to a paid Firebase setup just to get the foundation working.

The product is now live on Whop as a one-time purchase.

I would genuinely love feedback from people building SaaS with Next.js or Firebase:

What part of the SaaS foundation do you find yourself rebuilding most often?

I've spent the last few weeks building SaaSStinger Lite, a production-ready SaaS starter focused specifically on developers building with Next.js + Firebase.

The motivation was pretty straightforward: every new SaaS seems to require rebuilding the same foundational pieces before you can work on the actual product.

For SaaSStinger Lite, I wanted those pieces to be structured as a proper application architecture rather than a collection of disconnected starter components.

The architecture

The foundation includes:

• Next.js 16 / App Router

• React 19

• TypeScript

• Firebase Authentication

• Cloud Firestore

• Multi-workspace architecture

• Workspace memberships

• OWNER / ADMIN / MEMBER RBAC

• Invitation system

• Audit logs

• Usage tracking

• Workspace and profile settings

• Service-layer architecture

• Secure Firestore rules

• Production documentation

One of the areas I spent a lot of time on was workspace-scoped authorization.

The goal isn't simply to hide UI elements based on a user's role. Access needs to be enforced throughout the application and reflected in the Firestore security model.

The same applies to invitations and memberships: the application needs to understand the relationship between a user, their membership, their role, and the workspace they're operating in.

Why Firebase?

I specifically wanted SaaSStinger Lite to be useful to developers who prefer Firebase but don't want to rebuild all of this infrastructure themselves.

It's designed to work with the Firebase Spark plan, without relying on Cloud Functions.

That makes the initial infrastructure relatively simple while still giving the application a proper foundation for authentication, persistence, authorization and workspace management.

What I'm trying to solve

The goal isn't to provide another collection of UI components.

It's to get developers past the repetitive infrastructure stage so they can spend their time building the actual SaaS product.

SaaSStinger Lite is now available for $129 as a one-time purchase.

Website: https://saasstinger-website.vercel.app

I'd particularly like feedback from other developers building with Next.js and Firebase:

What's the SaaS infrastructure you find yourself rebuilding every time you start a new project?