Neither Fluid UI nor Cleanmock offers a free trial.
Fluid UI is designed for Large Enterprises, Medium Business and Small Business.
Cleanmock is designed for Individuals, Medium Business and Small Business.
Pricing for Fluid UI Starts at $8.25/Month when Billed Yearly whereas for Cleanmock Starts at $4/Month when Billed Yearly.
Some top alternatives to Fluid UI includes Miro, UX-App, HotGloo, Balsamiq, MockupTiger, Axure RP, Wireframe.cc, Claritee, Stage and Zen Wireframe.
Some top alternatives to Cleanmock includes Miro, Justinmind, NinjaMock, Balsamiq, Axure RP, Mockplus, Claritee, Stage, Previewed and Zen Wireframe.