Neither ZBrush nor 3D Slash offers a free trial.
ZBrush is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
3D Slash is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for ZBrush Starts at $39.95/Month whereas for 3D Slash Starts at $2/Month.
Some top alternatives to ZBrush includes Mari, 3D Slash, Strata Sculpt 3D, 3ds Max, Maya, Wings 3D, Modo, formZ and Adobe Substance 3D Painter.
Some top alternatives to 3D Slash includes Vectary, CL3VER, SelfCAD, Clara.io, Strata Sculpt 3D, SketchUp, 3ds Max, Blocks and Spline.