Tableau desktop can be connected to marketo using WDC option.Please check the below links.
hope it helps.
The Dashboard Starter feature is currently on Tableau Online only. However, if you are interested in just the dashboards, you can still download them from https://prerelease.tableau.com/key/EarlyFeedback. Sign in to the site with your Tableau ID and look for Marketo pre-built dashboards on the left pane. Once downloaded, the workbooks can be opened in Tableau Desktop and be modified as any normal workbook.