🏢 How We Build Multi-Tenant SaaS Platforms on Google Cloud
Complete guide to building scalable multi-tenant SaaS applications on Google Cloud Platform
Table of Contents
🏢 How We Build Multi-Tenant SaaS Platforms on Google Cloud
If you're building a SaaS product, one of your biggest architectural decisions will be:
> "Should I build it for one customer... or 1,000?"
We help companies design, build, and launch multi-tenant SaaS apps that scale from the first user to the millionth -- securely, efficiently, and with zero tech debt.
Our go-to stack for these platforms?
- ✅Google Cloud Platform (GCP)
- ✅PostgreSQL / Firestore
- ✅Cloud Run
- ✅Firebase Auth / Auth0
- ✅Looker Studio / BigQuery
- ✅Stripe / Razorpay integrations
- ✅And more...
In this post, we'll show:
- What multi-tenancy really means
- The patterns we use (schema, auth, billing)
- Real architectures built on GCP
- How to avoid common mistakes
🧠 What Is Multi-Tenancy?
Multi-tenancy means:
> One app instance serves multiple customers (tenants), with data logically isolated -- not physically separated.
Single-Tenant | Multi-Tenant |
|---|---|
One DB per customer | Shared DB with tenant ID per record |
Isolated deployments | Shared infra, isolated access |
High cost per tenant | Cost-effective scaling |
Easier to secure | Harder to secure, needs solid design |
We help startups and enterprise teams pick the right model based on:
- Security requirements
- Compliance (GDPR, HIPAA)
- Customization needs
- Data volume and scaling
🏗️ How We Architect Multi-Tenant SaaS on Google Cloud
🔹 1. Tenant-Aware Data Models
We use:
- PostgreSQL (via Cloud SQL or Supabase)
- Firestore (for real-time needs)
All tables include a `tenant_id`, enforced with:
- Row-Level Security (RLS) in Postgres
- Custom Firestore security rules
This ensures complete data isolation -- even in shared databases.
🔹 2. Secure User Authentication
- ✅Firebase Auth or Supabase Auth
- ✅Optional SSO (Google Workspace, Azure, Okta)
- ✅JWT-based auth for API access
- ✅Role-based access control per tenant
- ✅Session management + audit logging
🔹 3. Auto Tenant Provisioning
- New tenant signs up
- We create:
- Tenant record
- Default roles, permissions
- Stripe customer
- Optional subdomain (`tenant.myapp.com`)
🧠 All handled by a Cloud Run function with API key + webhook triggers.
🔹 4. Billing & Subscription Logic
- Stripe or Razorpay integration
- Tenant-level metering (usage-based or plan-based)
- Auto-suspend on payment failure
- Webhooks to update roles/features dynamically
🔹 5. Custom Dashboards Per Tenant
- Data pipelines to BigQuery
- Visualized in Looker Studio or Metabase
- Filtered by `tenant_id` or scoped view
- Optional: Give clients access to their own metrics in real-time
🔄 Our Tech Stack (GCP-Powered)
Layer | Tools |
|---|---|
Frontend | Nuxt 3 / Next.js / Flutter Web |
Backend | Node.js / FastAPI on Cloud Run |
Auth | Firebase Auth / Supabase / Auth0 |
Database | PostgreSQL (Cloud SQL), Firestore |
Billing | Stripe / Razorpay |
Storage | Cloud Storage |
Observability | Cloud Logging, Uptime, Prometheus |
Analytics | BigQuery + Looker Studio |
CI/CD | Cloud Build + GitHub Actions |
🧱 Sample Diagram: Multi-Tenant GCP SaaS
(Optional -- I can create this as SVG or PNG)
- Auth → Cloud Run → DB
- Each request includes `tenant_id`
- RLS / Firestore rules enforce access
- Billing / Stripe hooks
- Admin panel with scoped dashboards
💬 What Clients Say
> "They designed our whole multi-tenant SaaS architecture -- from signup to billing to analytics -- and it just works."
> -- Founder, Legal SaaS Startup
> "Thanks to their setup, we onboarded 17 companies in our first month without changing a single line of backend code."
> -- CTO, B2B Productivity App
📞 Want to Build a SaaS That Scales?
We specialize in:
- ✅Multi-tenant SaaS design on GCP
- ✅Auth, billing, analytics, dashboard setup
- ✅Custom internal tools and white-label portals
- ✅Secure, scalable API architectures