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Multi-Tenant SaaS Architecture That Doesn't Bite Back
Row-level security, per-tenant isolation and billing design decisions you cannot easily reverse later.
Velixor Labs · 9 min read
Multi-tenancy is the decision you make once and live with for years.
Pick your isolation model early
Shared schema with row-level security scales best for most B2B SaaS. Dedicated schemas only pay off with strict compliance requirements.
Make tenant ID non-optional
Every table, every query, every index. Enforce it at the database layer, never only in application code.
Design billing alongside the data model
Metered usage is far easier to add on day one than to retrofit into a year of events.
Plan for the noisy neighbour
Per-tenant rate limits and queue fairness prevent one customer from degrading everyone else.