Yes, both Slemma and Whatagraph offer a Free Trial.
Slemma is designed for Medium Business and Small Business.
Whatagraph is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slemma Starts at $89/Month when Billed Yearly whereas for Whatagraph Starts at $119/Month.
Some top alternatives to Slemma includes Alteryx, iDashboards, DataHero, Databox, DashThis, Klipfolio Dashboard, myDATA3, Easy Insight, AppInsights and Analytics Canvas.
Some top alternatives to Whatagraph includes AgencyAnalytics, Reportz, iDashboards, DashThis, myDATA3, GreyMetrics, Megalytic, AgencyREPORTER, Analytics Canvas and SharpDash.