Pentaho vs Tableau

Open-source provider of reporting, analysis, dashboard, data mining and workflow capabilities. Easily access, manage and blend any data from any source. Turn data into insights and make information-driven decisions
Tableau complements your natural ability to understand data visually. Our breakthrough products let you create rich analyses and share your insights with colleagues in seconds. Connect and visualize your data in minutes. Tableau is 10 to 100x faster than existing solutions. From spreadsheets to databases to Hadoop to cloud services, explore any data with Tableau.