The original title is: "Multi-Tenant SaaS with Next.js, Prisma & PostgreSQL (Practical Guide)"

Short summary

Three-pattern guide to multi-tenancy architecture: shared schema (recommended for 100-10k tenants), schema-per-tenant (isolation with complexity), database-per-tenant (enterprise, heaviest ops). Use row-level security and tenant filtering in all queries; avoid PgBouncer transaction mode.

• •Shared schema with tenant_id is the recommended starting point for most SaaS
• •Always filter queries by current tenant; use RLS policies as a database-level safety net
• •Session mode or transaction-scoped context prevents data leaks in connection pooling

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