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