SaaS Architecture Guide
Production-ready architecture patterns for building scalable SaaS. Database design, API structure, security, and multi-tenancy.
Architecture Layers
A modern SaaS stack from frontend to infrastructure.
Server-first React with streaming and progressive enhancement.
Type-safe APIs with automatic validation and error handling.
Secure auth with database-level access control.
Relational data with real-time subscriptions.
Full subscription lifecycle management.
Global deployment with automatic scaling.
Database Schema Patterns
Choose the right pattern for your business model.
User-Centric Schema
All data relates back to users. Simple queries, easy permissions.
Best for: Most B2C and simple B2B SaaS
Organization-Centric Schema
Data belongs to organizations, users belong to organizations.
Best for: B2B SaaS with teams (LaunchKit Teams)
Hybrid Schema
Some data is personal, some is organizational.
Best for: Products that serve both individuals and teams
Security Patterns
Security best practices built into the architecture.
- ✓Row-level security policies
- ✓API route authentication middleware
- ✓CSRF protection on mutations
- ✓Rate limiting on sensitive endpoints
- ✓Input validation with Zod
- ✓Secure session handling
- ✓Environment variable management
- ✓Webhook signature verification
Multi-Tenant Architecture
For B2B SaaS with teams and organizations.
Single-Tenant
- - One user = one account
- - Simple permissions
- - Personal data only
- - LaunchKit Core
Multi-Tenant
- ✓Organizations as tenants
- ✓Team memberships
- ✓Role-based permissions
- ✓LaunchKit Teams
Production Architecture, Ready to Use
LaunchKit implements these patterns out of the box.
Get LaunchKit