Metabase

metabase.com

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Open-source business intelligence and data visualization tool — connect a database and build dashboards without Tableau's licensing cost.

Why it is useful

Metabase lets non-technical users build charts and dashboards through a point-and-click query builder while still supporting raw SQL for analysts who need it, connecting directly to most popular databases. Self-hosting it is free, compared to Tableau's per-seat licensing that scales expensively with team size.