SaaS database architecture decides cost and isolation. Spygar implements these patterns on multi-tenant SaaS development and documents them alongside building multi-tenant apps.
If tenant_id is optional in queries, you do not have multi-tenant architecture—you have a future incident.
Pattern notes
- Shared tables — simplest ops; require disciplined scoping and composite indexes
- Schema-per-tenant — stronger isolation; migrate tooling must be excellent
- DB-per-tenant — max isolation; automate provisioning or drown in toil
Also see our earlier post on multi-tenant database patterns and commercial help via SaaS development.
