SAS BI is a wholly different beast to Tableau.
SAS supplies arguably the most sophisticated analytics platform on the planet, should someone need that level of capability. However it is fairly top heavy, and not particularly easy to use. Tableau on the other hand is fairly limited in functionality, but very easy to use. They complement each other quite well, and perhaps should not be seen as alternatives.
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3.9 – SAS BI will attract larger organizations with complex needs. Even here however there may be resistance to the high price of SAS products and a need to find simpler solutions for some requirements.
3.7 – Tableau is often the first supplier that comes to mind when businesses consider data visualization tools. While the product is easy to use, and produces very attractive visuals, it is not particularly sophisticated and may prove inadequate as needs mature. This has recently been addressed to some extent through an interface to R, but this is a classic choice between ease-of-use and sophistication – and Tableau has done very well by focusing on the former of these two.