Three Multi-Tenant Database Strategies for Laravel SaaS Apps Explained

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Laravel SaaS applications must choose between three multi-tenancy strategies: row-level tenancy with a shared schema, separate schemas per tenant, or fully isolated databases per tenant. Row-level tenancy is the most common starting point, using a tenant_id column to separate data, but it risks data leaks if query scoping is forgotten. Schema and database isolation offer stronger guarantees but come with significantly higher operational costs around migrations, backups, and connection pooling. Developers can mitigate row-level risks by implementing a global Eloquent scope that automatically filters queries by the current tenant, removing the need to manually apply filters in every controller. Most Laravel SaaS products are advised to begin with row-level tenancy and only upgrade to stricter isolation when enterprise security requirements or scale genuinely demand it.

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