SaaSBase: Production-Ready Foundation for Your Multi-Tenant SaaS Applications

🚀 Introduction

Have you ever wondered how much time and effort it takes to build a complete SaaS (Software as a Service) application from scratch? Authentication, authorization, multi-tenancy, user management, role-based access control – building all of these from scratch can take months and months of development time.

SaaSBase comes to solve this problem. It’s a production-ready, open-source foundation that gives you a complete multi-tenant SaaS application base, on top of which you can add your unique business logic.

Landing Page

🎯 What is SaaSBase?

SaaSBase is an enterprise-grade, multi-tenant SaaS foundation that is industry-agnostic – meaning you can use it for any type of business domain. It provides a solid foundation for healthcare, e-commerce, education, HR, project management, CRM – any SaaS idea you can think of.

Why SaaSBase?

✅ Complete Foundation: Start with a production-ready base instead of building from scratch
✅ Multi-Tenant Ready: Built-in organization management and tenant isolation
✅ Enterprise-Grade: Designed for large-scale, production deployments
✅ Industry Agnostic: Use it for any business domain
✅ Open Source: Completely free under MIT License
✅ Production Ready: Security, scalability, and best practices out of the box

🏗️ Technical Architecture

Technology Stack

Backend:

  • Framework: .NET 7.0 Web API
  • ORM: Entity Framework Core
  • Database: PostgreSQL (default, easily switchable)
  • Authentication: JWT tokens
  • Caching: Redis
  • Logging: Serilog
  • API Documentation: Swagger/OpenAPI

Frontend:

  • Framework: Angular 17+
  • Styling: SCSS with CSS variables
  • Icons: Font Awesome
  • State Management: RxJS, NgRx
  • UI Components: Angular Material, Bootstrap

Architecture Pattern: Clean Architecture

SaaSBase follows Clean Architecture principles, which ensures:

  • Separation of Concerns: Each layer has a specific responsibility
  • Testability: Easy unit and integration testing
  • Maintainability: Well-structured codebase
  • Scalability: Can handle enterprise-scale workloads
Presentation Layer (Angular Frontend)
         ↓
API Layer (Controllers)
         ↓
Application Layer (Services, DTOs)
         ↓
Domain Layer (Entities, Business Rules)
         ↓
Infrastructure Layer (Database, External Services)

🔑 Core Features

1. Multi-Tenant Architecture (Core Feature)

SaaSBase’s most important feature is its complete multi-tenant architecture:

  • Organization-based tenant isolation: Complete isolation at the data level
  • Tenant context management: Tenant context in every request
  • Scalable tenant management: Supports thousands of tenants
  • Organization hierarchy: Departments, locations, positions support
  • Tenant-specific configurations: Each tenant’s own settings
Organization Setup
Organization Management
Organization Settings

2. Authentication & Authorization

  • JWT-based authentication: Secure token-based authentication
  • Role-Based Access Control (RBAC): Admin, Manager, User roles ready
  • Permission management: Granular access control
  • Multi-factor authentication (MFA): Additional security layer
  • Password policy enforcement: Strong password requirements
  • Session management: User session tracking
Login Page

3. User & Organization Management

  • User management: Complete CRUD operations
  • Organization setup: Easy organization creation
  • Department management: Organizational hierarchy
  • Position management: Job positions tracking
  • Location management: Multi-location support
User Management
Role Hierarchy

4. Performance & Caching

  • Redis integration: Frequently accessed data caching
  • Response caching: API response optimization
  • Performance monitoring: Built-in performance tracking

5. Additional Enterprise Features

  • Audit & Logging: Centralized logging with Serilog
  • Action auditing: Sensitive operations tracking
  • User activity tracking: Complete audit trail
  • File upload & management: File handling system
  • Import/Export: Data import/export functionality
  • Email service: SendGrid integration
  • SMS service: SMS notification support
  • Notification templates: Customizable notifications
  • Menu management: Dynamic navigation

📊 Use Cases

SaaSBase can be used as a foundation for any SaaS application:

Healthcare SaaS

  • Patient management systems
  • Clinic management systems
  • Medical record systems

E-commerce Platforms

  • Multi-vendor marketplaces
  • Store management systems
  • Inventory management

Education Platforms

  • Learning Management Systems (LMS)
  • Course platforms
  • Student management systems

HR & Payroll

  • Employee management
  • Payroll systems
  • Attendance tracking

Project Management

  • Team collaboration tools
  • Task management systems
  • Project tracking

CRM Systems

  • Customer relationship management
  • Sales tracking
  • Lead management

And many more! – Because SaaSBase is domain-agnostic, you can implement any SaaS idea.

🚀 Quick Start

Prerequisites

  • .NET 7.0 SDK or later
  • Node.js 18+ and npm
  • PostgreSQL (or your preferred database)
  • Redis (for caching)

Installation Steps

  1. Clone the Repository:
git clone https://github.com/kawser2133/saas-base.git
cd saas-base
  1. Database Setup:
CREATE DATABASE saas_base_db;
  1. Backend Configuration:
cd SaaSBase.Api
dotnet restore
dotnet ef database update
dotnet run
  1. Frontend Setup:
cd SaaSBase.Web
npm install
npm start
  1. Login:
  • URL: http://localhost:4200
  • Email: admin@saasbase.com
  • Password: Admin@123!

⚠️ Important: Change the password on first login!

🔐 Security Features

SaaSBase comes with enterprise-grade security features:

  • ✅ JWT-based authentication
  • ✅ Role-based access control (RBAC)
  • ✅ Multi-factor authentication
  • ✅ Session management
  • ✅ Password policies
  • ✅ Data encryption (at rest and in transit)
  • ✅ SQL injection prevention
  • ✅ XSS protection
  • ✅ CSRF protection
  • ✅ Rate limiting
  • ✅ API versioning

📈 Why Choose SaaSBase?

Time Savings

Building a multi-tenant SaaS application from scratch can take 6-12 months. With SaaSBase, you can start implementing your business logic within weeks.

Cost Effective

Building an enterprise-grade SaaS foundation requires significant resources. SaaSBase is completely free and open-source under the MIT License.

Best Practices

SaaSBase follows industry best practices:

  • Clean Architecture
  • SOLID principles
  • Repository Pattern
  • Unit of Work Pattern
  • Dependency Injection

Production Ready

SaaSBase is not just a demo project – it’s production-ready:

  • Security features built-in
  • Scalability considerations
  • Error handling
  • Logging and monitoring
  • Documentation

🎨 Screenshots

SaaSBase comes with a modern, responsive UI:

Landing Page

Landing Page

Login Page

Login Page

System Admin Dashboard

System Admin Dashboard

Company Admin Dashboard

Company Admin Dashboard

User Management

User Management

Organization Management

Organization Management

Organization Setup

Organization Setup

Organization Settings

Organization Settings

Role Hierarchy

Role Hierarchy

Profile Settings

Profile Settings

Mobile Responsive Design

Mobile Version 1
Mobile Version 2

🤝 Join the Community

SaaSBase is an open-source project, and it’s growing every day. If you find it useful, consider contributing! Whether it’s reporting a bug, suggesting a feature, improving documentation, or submitting code – every contribution helps make SaaSBase better for everyone.

The project is actively maintained, and we’re always looking for ways to improve. Check out the GitHub repository to see what’s happening, open issues, or start a discussion.

📚 Learning More

If you want to dive deeper into SaaSBase, the repository includes comprehensive documentation covering everything from architecture decisions to quick start guides. The codebase itself is well-structured and follows clean architecture principles, making it a great learning resource if you’re interested in building scalable SaaS applications.

For API documentation, once you have the project running locally, you can access the Swagger UI at http://localhost:5091/swagger to explore all available endpoints interactively.

💡 Real-World Example: Building a Healthcare Management System

Let me walk you through a real scenario. Imagine you’ve got this brilliant idea for a healthcare management system that can serve multiple clinics. You’re excited, you’ve got the domain knowledge, but the thought of building authentication, multi-tenancy, user management, and all that infrastructure from scratch is overwhelming.

Here’s what your journey would look like with SaaSBase:

Day 1: You clone the repository and get it running locally. The setup takes about 15 minutes – most of that time is just waiting for dependencies to install. You log in with the default admin credentials and explore the interface. Everything works out of the box.

Day 2-3: You start customizing. You add a Patient entity to the domain layer, create a service for patient management, and build a simple Angular component to display patients. The multi-tenant architecture is already handling organization isolation – each clinic’s data is automatically separated.

Week 1: You’ve got a working prototype. Patients can be added, viewed, and managed. The system already handles user authentication, role-based access, and organization management. You’re focusing on healthcare-specific features, not fighting with infrastructure.

Week 2-3: You polish the UI, add more healthcare-specific features, and deploy to production. The foundation is solid, secure, and scalable. You’re ready to onboard your first clinic.

What would have taken 6-12 months of infrastructure work is now done in weeks. You’ve spent your time building what makes your application unique, not reinventing the wheel.

🎯 Final Thoughts

Building a SaaS application is hard enough without having to build the foundation from scratch. SaaSBase exists to solve that problem. It’s not just another boilerplate or starter template – it’s a production-ready foundation that’s been built with enterprise needs in mind.

Whether you’re a startup founder trying to validate an idea quickly, a developer who wants to focus on business logic rather than infrastructure, or an enterprise team that needs a solid base to build upon, SaaSBase can accelerate your journey.

The best part? It’s completely open-source and free. You can use it, modify it, and build your dream SaaS application on top of it. The MIT License means you have complete freedom to use it commercially without any restrictions.

So, if you’re thinking about building a SaaS application, give SaaSBase a try. Clone the repository, explore the codebase, and see how much time you can save. Your future self will thank you.

Ready to get started? Head over to GitHub and star the repository to stay updated. Have questions or want to contribute? Open an issue or join the discussions. The community is growing, and we’d love to have you be part of it.

Built with ❤️ for developers who want to focus on what matters – their unique business value, not infrastructure.

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