Multi-Tenant SaaS Basics for First-Time Founders

Multi-tenancy means many customers share one product while their data stays logically separated.

Early SaaS usually starts with a shared application and tenant-aware data rows. That is enough for most launches.

Hard isolation becomes important with enterprise security requirements or noisy-neighbor risks.

Design tenant context into auth and queries from day one even if you only have one customer now.

Get the model right early and you avoid painful migrations right when growth finally appears.