Yes, both Miro and Cacoo offer a Free Trial.
Miro is designed for Large Enterprises, Medium Business and Small Business.
Cacoo is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Miro Starts at $8/User/Month when Billed Yearly whereas for Cacoo Starts at $5/User/Month when Billed Yearly.
Some top alternatives to Miro includes Collaboard, Microsoft Whiteboard, WhiteboardFox, Conceptboard, MURAL, Lucidspark, Whimsical, Board, Zoom Whiteboard and Witeboard.
Some top alternatives to Cacoo includes Miro, FigJam, SmartDraw, Gliffy, Microsoft Visio, DrakonHub, Creately, QuickDBD, Lucidchart, AutoCloud, Quick Diagram and diagrams.net.