Yes, both Vectorworks Designer and Navisworks offer a Free Trial.
Vectorworks Designer is designed for and undefined.
Navisworks is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Vectorworks Designer Starts at $4,813 whereas for Navisworks Starts at $78/Month when Billed Yearly.
Some top alternatives to Vectorworks Designer includes YouBIM, Space Designer 3D, Vectorworks Architect, Vectorworks Landmark, Navisworks, Archicad, Revit LT, IrisVR, MasterSeries and Autodesk Design Review.
Some top alternatives to Navisworks includes Autodesk BIM 360, YouBIM, BIMx, BIM Track, Vectorworks Architect, Vectorworks Landmark, Archicad, Revit LT and bimU.io.