Yes, both FlowMapp and Microsoft Visio offer a Free Trial.
FlowMapp is designed for Large Enterprises, Medium Business and Small Business.
Microsoft Visio is designed for Medium Business and Small Business.
Pricing for FlowMapp Starts at $8.25/Month when Billed Yearly whereas for Microsoft Visio Starts at $5/User/Month.
Some top alternatives to FlowMapp includes Miro, FigJam, UX-App, UX Metrics, Uizard, SmartDraw, Gliffy, Microsoft Visio, Creately, VisualSitemaps, UpDiagram and diagrams.net.
Some top alternatives to Microsoft Visio includes Miro, FigJam, SmartDraw, Gliffy, DrakonHub, Creately, 10SCAPE, Sankey Flow Show, Lucidchart, EDraw Max, Quick Diagram and diagrams.net.