Next.js Multitenant SaaS Boilerplate
Built a reusable Next.js foundation for B2B SaaS products, with tenant isolation, authentication, subscriptions, role-based access, audit logs, and deployment concerns handled upfront.
Role
Design and engineering
Tech Stack
NextJS
TypeScript
React
PostgreSQL
TailwindCSSFrontend
Next.js 15, React 19, TypeScript, Tailwind CSS 4
Backend
Next.js API Routes (RESTful)
Database
PostgreSQL 15+ with Drizzle ORM
Authentication
JWT via jose library with HTTP-only cookies
What is it?
A production-ready, full-stack multi-tenant SaaS boilerplate that accelerates the development of B2B SaaS applications. It includes complete tenant isolation, subscription management, role-based access control, and all the essential features needed to launch a SaaS product quickly.
Why use it?
Building a SaaS application from scratch takes months of development time. This boilerplate provides all the foundational features: authentication, multi-tenancy, subscriptions, and more, so you can focus on building your unique product features instead of reinventing the wheel.
Architecture Highlights
Multi-Tenancy Architecture
Row-level isolation with automatic company ID validation on all requests. Every database query is filtered by tenant ID, and subscriptions enforce feature access control per tier.
Security Best Practices
JWT secrets in environment variables, HTTPS for HTTP-only cookies, rate limiting on API endpoints, Zod schema validation, Content Security Policy headers, comprehensive audit logs, API key rotation, and 2FA support.
Database Schema
Core tables include companies, users, subscriptions, payments, notifications, auditLogs, apiKeys, integrations, and integrationLogs with comprehensive relationship management using Drizzle ORM.
Developer Experience
Full TypeScript type safety, Drizzle ORM with PostgreSQL, RESTful API architecture, Docker containerization for development and deployment, and modern tooling throughout.
Core Features
- Complete company/tenant management with isolated data
- Role-based access control (ADMIN, MANAGER, STAFF, VIEWER)
- Multiple subscription tiers (FREE, BASIC, PRO, ENTERPRISE)
- Payment processing and transaction tracking
- JWT-based authentication with HTTP-only cookies
- Two-factor authentication support
- Comprehensive audit logging (CREATE, UPDATE, DELETE, LOGIN, LOGOUT, EXPORT, IMPORT)
- Granular permission system
- API key management with secure key/secret pairs
Business Features
- Multi-tier notification system (SYSTEM, ALERT, TASK, UPDATE, BILLING)
- API key management framework
- Integration support (Payment Gateways, Email, SMS, ERP, CRM)
- Email verification workflows
- Dark mode support with per-tenant theming
- Built-in reporting and Excel export functionality
Perfect For
B2B SaaS platforms requiring tenant isolation
Project management tools with team collaboration
CRM and customer management systems
Analytics and reporting platforms
Workflow automation tools
Team communication and collaboration apps
Getting Started
git clone https://github.com/sudharsangs/nextjs-multitenant-saas-boilerplate
cd nextjs-multitenant-saas-boilerplate
cp .env.example .env
npm install
npm run db:migrate
npm run dev
Contact
Interested in working together?
I take on selected consulting and freelance work: full-stack builds, ERP and SaaS implementation, technical SEO, and operations-heavy products. I’m also open to conversations about FactoStack or forward-deployed engineering work.