Yes, both Clara.io and Adobe Dimension offer a Free Trial.
Clara.io is designed for Large Enterprises, Medium Business and Small Business.
Adobe Dimension is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Clara.io Starts at $10/Month whereas for Adobe Dimension Starts at $19.99/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 Adobe Dimension includes Vectary, SelfCAD, SketchUp, Giraffe, 3ds Max, Maya, Cinema 4D, Modo and Spline.