Multi-Tenancy Architecture for B2B SaaS

B2B SaaS serves multiple customers (tenants) from one codebase. Shared DB, schema per tenant, or DB per tenant — each has tradeoffs. Here's how to choose.

Table of Contents

• Shared Database
• Schema Per Tenant
• Database Per Tenant
• When to Choose
• Frequently Asked Questions

Shared Database

One DB, tenant_id on every table. Simplest. Row-level security. Best for most B2B SaaS. See our SaaS Architecture guide.

Schema Per Tenant

One DB, separate schema per tenant. Better isolation. Harder to manage at scale. For mid-market.

Database Per Tenant

Full isolation. For enterprise, compliance. Higher cost. Use when shared won't work.

When to Choose

• Shared: Default for most. Simple, scalable.
• Schema: Need more isolation, fewer tenants.
• DB per tenant: Enterprise, compliance requirements.

Frequently Asked Questions