Power BI versus Tableau

This depends on what your looking for?

Power BI can be compared to Tableau as a data visualization and discovery tool but not as a business intelligence platform and I agree with Gartner that Power BI is the better choice even at that level.  Power BI is much more than Tableau and alot cheaper.

Power BI has easily surpassed Tableau(Gartner can hardly keep up enhancements to Power BI) and Power BI continues to move ahead.  When Power BI hits on premise Report Services integration there will be only one choice for anyone running any form of SQL Server.   Power BI still beats Tableau even if you aren't running SQL Server. 

Its cheaper, and offers much more functionality with integration across the board.   Your only real hope of a "up to date" comparison is Gartner but like I said even they can't keep up with Power BI.  Its the same for Tabeau, they can't keep up.

 Take a look here for some info, even this is a little older but MS has moved to address cautions.  Most others simply don't have that agility.

https://www.gartner.com/doc/reprints?id=1-2XYY9ZR&ct=160204&st=sb

Power BI is a robust and cost-effective BI tool, especially for businesses in the Microsoft ecosystem. Its seamless integration with Microsoft 365 and Azure, user-friendly interface, and powerful data modeling make it a top choice for many organizations. Power BI also offers a vast library of visuals and regular updates, ensuring scalability and security.

While Tableau is known for its advanced visualization capabilities and interactivity, it often comes at a higher cost and steeper learning curve. For businesses prioritizing affordability, ease of use, and integration with existing Microsoft tools, Power BI is often the better choice.

Power BI is cost-effective and user-friendly, ideal for Microsoft users; Tableau excels in advanced visuals and customization. Read More: Power BI vs Tableau