Building Multi-Tenant Row-Level Security in PostgreSQL: A Production Pattern

<p>If your SaaS charges customers and also plugs into those customers' billing stack, you do not have one billing problem. You have two.</p> <p>You need to bill your own customer

<p>Building a B2B SaaS platform for transport companies, I faced a critical architectural decision: separate database per tenant or shared database with logical isolation?</p>

<p>so I've been building <a href="https://ship-safe.co" rel="noopener noreferrer">ShipSafe</a> — security scanner for AI-generated code — and a few weeks ago I got curious. like,

<p>On January 28, 2026, Moltbook launched to considerable fanfare. The pitch was bold: an "agent-first, human-second" social network where 1.5 million autonomous AI agents could

<p>Multi-tenancy has three common implementations: a database per tenant, a<br /> schema per tenant, and a column on every row. For a SaaS that starts small and<br /> must stay

<h1> Architecting Multi-Tenant Billing Engines: A Database Schema Guide </h1> <p>When building a Software-as-a-Service (SaaS) application, developers often spend most of their

<h1> Multi-Tenant Auth with Cognito and PostgreSQL Row-Level Security (Part 2) </h1> <p><em>How a single Postgres session variable — <code>app.current_tenant_id</code> —

<p>A semantic search system has already crossed its security boundary before generation begins: if retrieval admits another customer's chunk, no prompt can make that access