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