Yes, both SelfCAD and Vectary offer a Free Trial.
SelfCAD is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Vectary is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for SelfCAD Starts at $14.99/month when monthly whereas for Vectary Starts at $12custom when yearly.
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 Vectary includes 3D Slash, SelfCAD, Clara.io, SketchUp, 3ds Max, Blocks, Spline, Rapid Mockup and Concept3D.