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    Multi-Tenant SaaS

    A production multi-tenant SaaS platform where each customer (tenant) gets isolated data, custom branding, and independent subscription billing. Built with Laravel backend, React/Next.js frontend, and Stripe for subscription management.

    100 – 100Kusers supported
    $150 – $1,200/month infrastructure

    Architecture Diagram

    Interactive — hover over any node to see its role and description.

    Tenant UserNext.js AppReact + TailwindLaravel APIPHP 8.3Tenant LayerMiddlewarePostgreSQLRow-level SecurityRedis CacheStripeSubscriptionsAWS SQSJob QueueEmail WorkerSendGridAWS S3Media / ExportsUserFrontendAPIBackendDatabaseCacheExternalQueueStorage

    Use Cases

    B2B SaaS products with multiple business customers
    White-label software platforms
    Project management or CRM tools sold to companies
    HR or payroll platforms serving multiple organisations
    Analytics dashboards sold as a service

    Technology Stack

    frontend

    Next.jsReactTypeScriptTailwind CSS

    backend

    Laravel 11PHP 8.3Laravel SanctumLaravel Cashier

    database

    PostgreSQLRedis

    infrastructure

    AWS EC2AWS RDSAWS S3AWS SQSDocker

    integrations

    StripeSendGridPusher

    Scalability Roadmap

    Stage 10 – 500 users· Single EC2 + RDS

    Single EC2 instance running Laravel with shared PostgreSQL. Handles up to 10 tenants comfortably.

    Stage 2500 – 10K users· Auto Scaling + RDS Multi-AZ

    Horizontal scaling of Laravel API behind a load balancer. Multi-AZ RDS. Separate queue workers.

    Stage 310K – 100K users· ECS + Aurora + ElastiCache

    Containerised API on ECS. Aurora PostgreSQL for high concurrency. Redis cluster for session scaling.

    Stage 4100K+ users· Per-tenant DB + Global CDN

    Dedicated databases for enterprise tenants. CloudFront CDN for assets. Read replicas per region.

    Cost Breakdown

    Development Cost

    $12,000 – $30,000 (8–14 weeks)

    Infrastructure Cost

    $150 – $1,200/month based on tenant count and usage

    Maintenance Cost

    $1,500 – $4,000/month for DevOps, support, and feature work

    Security Considerations

    Subdomain-based tenant isolation with CORS policy per tenant
    Row-level security in PostgreSQL enforcing tenant_id on every table
    Stripe webhook signature verification to prevent billing fraud
    RBAC with owner, admin, member roles per workspace
    Daily encrypted RDS snapshots retained for 30 days
    OWASP Top-10 hardened Laravel middleware stack

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