Tableau and Power BI are both business intelligence tools for data visualization. Tableau is owned by Salesforce, focuses on data visualization, and handles large data volumes quickly without limiting data points. It is more expensive than Power BI but has more extensive features and integrations. Power BI is part of Microsoft and is cloud-based, easier to use, and cheaper than Tableau but performs more slowly with large data volumes. The document provides a comparative analysis of the tools' histories, pricing, features, and integrations to help determine which product may be a better fit.