SAAS
Multi-Tenant CRM Schema
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CASE ANALYSIS
Scenario
A SaaS startup builds a multi-tenant CRM where each tenant’s data is logically separated within a shared database schema by a tenant_id foreign key in every table.
Key decisions
- All tables include a tenant_id FK to Tenant to enforce data isolation at the application level.
- Users, contacts, leads, deals, and activities are scoped per tenant.
- Relationships are defined with mandatory foreign keys and many-to-one cardinalities.
When to reuse this
Use this pattern when building a multi-tenant SaaS application where simplicity and resource efficiency outweigh strict physical data isolation, and row-level security is managed in the application layer.
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