Yes, both Axure RP and Claritee offer a Free Trial.
Axure RP is designed for Large Enterprises, Medium Business and Small Business.
Claritee is designed for Individuals, Medium Business and Small Business.
Pricing for Axure RP Starts at $25/User/Month when Billed Yearly whereas for Claritee Starts at $10/Month when Billed Yearly.
Some top alternatives to Axure RP includes Miro, Adobe XD, HotGloo, Pidoco, NinjaMock, Balsamiq, Wireframe.cc, Claritee, Stage and Zen Wireframe.
Some top alternatives to Claritee includes Miro, NinjaMock, Balsamiq, Moqups, Axure RP, Wireframe.cc, Wirify, Stage, Previewed, Zen Wireframe and Mockframe by 500apps.