Why Multi-Tenant SaaS Architecture Matters for Business Messaging
When businesses send thousands of WhatsApp messages a day, every architectural decision becomes a trust decision. A leaked contact list, a miscounted invoice, or a misrouted message can end a relationship in seconds.
At Gigaviz, we chose multi-tenant architecture from day one—not because it's trendy, but because it solves real problems that single-tenant setups simply can't.
The problem: shared infrastructure, separate concerns
Most teams start with a simple setup: one database, one login, one admin panel. It works until your second client joins and asks "can you guarantee my data is never visible to anyone else?"
That question is the dividing line between a prototype and a platform.
How Gigaviz handles workspace isolation
Every query in Gigaviz is scoped by `workspace_id`. This isn't a convention—it's enforced at three layers:
1. Row Level Security (RLS)
Every user-facing table has PostgreSQL RLS policies that check workspace membership before returning data. Even if application code has a bug, the database itself blocks unauthorized access.
2. App Context Resolution
Server components call a context resolution function to resolve the authenticated user, their workspace, their role, and their entitlements—before any business logic runs. There's no way to skip this step.
3. Entitlement Gating
Features are gated by entitlements (mapped to specific product modules), which combine plan subscriptions with admin-granted overrides. You can’t access what you haven’t been granted.
Why this matters for WhatsApp operations
WhatsApp Business Platform requires strict compliance. Messages must go through approved templates, contacts must be managed carefully, and delivery logs must be auditable.