Yes, both SelfCAD and Clara.io offer a Free Trial.
SelfCAD is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Clara.io is designed for Large Enterprises, Medium Business and Small Business.
Pricing for SelfCAD Starts at $11.99/Month when Billed Yearly whereas for Clara.io Starts at $10/Month.
Some top alternatives to SelfCAD includes 3D Slash, Clara.io, SketchUp, 3ds Max, ZBrush, formZ, Onshape, BricsCAD and Autodesk Design Review.
Some top alternatives to Clara.io includes 3D Slash, CL3VER, SelfCAD, SketchUp, SkyCiv, 3ds Max, Blocks, Wings 3D and SwiftXR.