MERN SaaS Starter Kit
A open source free SaaS subscription starter kit
FreeOpen Source225 impressions#362 of its week
A free open-source MERN starter kit with auth, Stripe subscriptions, email, reCAPTCHA and TypeScript-based full-stack boilerplate.
- for
- Developers building SaaS products with the MERN stack who want a production-ready foundation.
- pricing
- open source
- license
- open source
Key features
- Authentication — Local email/password login with bcrypt and Google OAuth 2.0, plus email verification and password recovery.
- Payments & Subscriptions — Stripe integration supporting multiple plans, monthly/annual billing and webhook-driven subscription management.
- Email System — Configurable email sending via AWS SES, Mailgun or Nodemailer with templates and retry logic.
- Security — Rate limiting, CSRF protection, Google reCAPTCHA v3 and security headers for hardened endpoints.
- Modern Frontend — React 19 with TypeScript, Tailwind CSS, shadcn/ui components and React Query for cached API data.
- Backend Architecture — Express.js API written in TypeScript, MongoDB with Mongoose, and RESTful routes with role-based access.
Use cases
- Rapidly prototype a subscription-based web app with built-in auth and billing
- Launch a SaaS product and focus on unique business logic instead of infrastructure
- Create a multi-tenant dashboard with secure user management and email notifications
MERN SaaS Starter Kit vs alternatives
 MERN SaaS Starter Kit |  Open SaaS |  Appwrite |  Polar |  Supabase | |
|---|---|---|---|---|---|
| Best for | Full-stack SaaS starter kit | React + Node SaaS starter with Postgres | Self-hosted backend platform | Payments-first SaaS infrastructure | Hosted Postgres + auth platform |
| Pricing | Open source | Free | Subscription | Subscription | Subscription |
| DevHunt upvotes | 0 | 98 | 0 | 0 | 0 |
| Launched | Jan 2026 | Jan 2024 | — | — | — |
- MERN SaaS Starter Kit vs Open SaaS: Open SaaS is also a free React & Node starter but focuses on PostgreSQL instead of MongoDB and has a different UI stack.
- MERN SaaS Starter Kit vs Appwrite: Appwrite provides a self-hosted backend-as-a-service, while this kit bundles the backend code itself.
- MERN SaaS Starter Kit vs Polar: Polar offers a ready-made payments and billing service; the kit includes Stripe integration but also handles auth and UI.
- MERN SaaS Starter Kit vs Supabase: Supabase supplies a hosted Postgres database and auth APIs, whereas this kit is a full MERN codebase you run yourself.
MERN SaaS Starter Kit FAQ
What services do I need to run the starter kit?+
You need a MongoDB Atlas account, a Stripe account, a Google Cloud project for OAuth & reCAPTCHA, and an email provider (AWS SES, Mailgun or Gmail).
Is the kit ready for production?+
Yes, it includes production-ready features such as rate limiting, CSRF protection, secure session storage and Stripe webhook handling.
Can I customize the UI?+
The frontend uses React, Tailwind CSS and shadcn/ui, so you can replace or extend components to match your design.
How is the code organized?+
The repository uses npm workspaces with separate client and server folders, each written in TypeScript.
Is there a demo I can try?+
A demo video is linked in the README (https://youtu.be/Hf3J6HceH1o) showing the kit in action.
Summarized by DevHunt from github.com · Oct 6, 2026. Details may change; check the official site.
