Yes, both HotGloo and Miro offer a Free Trial.
HotGloo is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Miro is designed for Large Enterprises, Medium Business and Small Business.
Pricing for HotGloo Starts at $12/Month when Billed Yearly whereas for Miro Starts at $8/User/Month when Billed Yearly.
Some top alternatives to HotGloo includes Miro, NinjaMock, Balsamiq, Moqups, Axure RP, Wireframe.cc, Claritee, Stage, Zen Wireframe and Mockframe by 500apps.
Some top alternatives to Miro includes Collaboard, Microsoft Whiteboard, WhiteboardFox, Conceptboard, MURAL, Lucidspark, Whimsical, Board, Zoom Whiteboard and Witeboard.