Here’s a quick chart that I created based on reading up from different sources about licenses required in office 2013/office 365 to use Power View and/or Power BI. It was not straight forward and I had to use multiple sources to find this information, so hopefully this helps you:

Please Note:

Double check w/ official sources. The chart is meant to guide to find the right license for your needs. Please use this as a starting point & use official resources before making a purchase decision.

Sources Used:

http://www.microsoft.com/en-us/powerBI/pricing.aspx#fbid=ygmkLW5EEH9

http://blogs.technet.com/b/the_microsoft_excel_support_team_blog/archive/2013/02/27/unable-to-use-excel-2010-powerpivot-workbooks-in-excel-2013.aspx

http://sqlblog.com/blogs/marco_russo/archive/2013/08/19/excel-2013-stand-alone-now-includes-powerpivot.aspx

http://office.microsoft.com/en-us/excel-help/power-view-explore-visualize-and-present-your-data-HA102835634.aspx

http://cwebbbi.wordpress.com/2013/02/01/office-2013-office-365-editions-and-bi-features/