Multi-Tenant Dashboards with ClickHouse: What Actually Works in Production

Customers expect analytics inside your product. Not in a separate BI tool. Inside your app, loading fast, showing only their data. ClickHouse is the engine most teams reach for when they need this at scale. PostHog, LaunchDarkly, and Inigo all run customer-facing analytics on it. What they all discovered: the hard part isn't query performance. It's tenant isolation, and most of the advice online gets the critical details wrong. Here's what actually works. Before you continue, full disclaimer, I'