Neither Rive nor Spline offers a free trial.
Rive is designed for Individuals, Medium Business and Small Business.
Spline is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Rive begins at $14/User/Month when Billed Yearly, while pricing details for Spline are unavailable.
Some top alternatives to Rive includes Harmony, Loading.io, Animation Desk, Adobe Animate, Adobe Character Animator, Spline, Stream Chat, Text Chat Animator, Flow and ImagickPro.
Some top alternatives to Spline includes Planner 5D, 3D Slash, Clara.io, SketchUp, Giraffe, Adobe Dimension, 3ds Max and Cinema 4D.