Yes, both Grapher and Tableau Server offer a Free Trial.
Grapher is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Tableau Server is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Grapher Starts at $50/Year whereas for Tableau Server Starts at $12/User/Month.
Some top alternatives to Grapher includes VizualSurvey, SAS Advanced Analytics, Easy Insight, Tableau Server, dataSights, Chartbrew, Qualified, Workvivo, DataSquirrel, Living Charts, Charts Factory and SharpDash.
Some top alternatives to Tableau Server includes Tableau, Microsoft Power BI, IBM Cognos Analytics, Dundas BI, QlikView, SAS Business Intelligence, ibi Analytics Platform, Microsoft Power BI Desktop and Tableau Prep.