Yes, both Navisworks and IrisVR offer a Free Trial.
Navisworks is designed for Large Enterprises, Medium Business and Small Business.
IrisVR is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Navisworks Starts at $78/Month when Billed Yearly whereas for IrisVR Starts at $225/Month.
Some top alternatives to Navisworks includes Autodesk BIM 360, YouBIM, BIMx, BIM Track, Vectorworks Architect, Vectorworks Landmark, Archicad, Revit LT and bimU.io.
Some top alternatives to IrisVR includes BIMx, BIM Track, Vectorworks Architect, Vectorworks Landmark, Archicad, Revit LT, Vectorworks Designer, SENTIO VR, Enscape and bimU.io.