The apartment building analogy
Think of multi-tenant like an apartment building. There's one building (the software), but every unit belongs to a different tenant (customer). The units are isolated — your neighbor stepping onto their balcony doesn't see yours.
Single-tenant is like every customer owning their own villa — extremely secure but expensive.
Advantages
Low cost: Shared infrastructure lowers per-customer cost.
Fast updates: One update applies to everyone simultaneously.
Easy scaling: New customers are onboarded in minutes.
Security concerns
The biggest concern in multi-tenant environments: data isolation. One customer must not see another's data.
This is ensured at the database layer with tenant_id and at the application layer with strict authorization. Onremo applies these security layers as standard.