Multi-Tenant Architecture: What to Decide Before You Build
Why this decision is hard to undo later
The way you isolate tenant data shapes your database schema, your authentication model, and your reporting from day one. Retrofitting multi-tenancy into a single-tenant architecture later is possible, but significantly more expensive than designing for it up front.
Key questions to answer early
How strictly does tenant data need to be isolated for your compliance and trust requirements? Will a single customer ever need multiple isolated workspaces? How will usage limits and plan tiers map onto your data model? What does your support team need to see across tenants versus within one?
There isn't one right answer
Shared-schema, schema-per-tenant, and database-per-tenant approaches all have valid use cases. The right choice depends on your expected scale, compliance needs, and operational capacity, not on which approach is most talked about.