Multi-Schema Supabase Architecture Guide

Most Supabase tutorials stop at a single public schema with basic RLS policies. That works for a weekend project, but production applications with multiple tenants, complex permission models, or domain separation need a more sophisticated approach. This guide covers multi-schema architecture in Supabase: when to use it, how to implement it, and the specific patterns that keep your data organized as your application scales to thousands of users across multiple product areas. The foundation is understanding PostgreSQL schemas. A schema is a namespace within a database. The default schema in Supabase is "public." Every table you create in the dashboard goes into public. But PostgreSQL supports unlimited schemas.