Yes, both Lucidchart and Cacoo offer a Free Trial.
Lucidchart is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Cacoo is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Lucidchart Starts at $0 whereas for Cacoo Starts at $5/User/Month when Billed Yearly.
Some top alternatives to Lucidchart includes Miro, FigJam, SmartDraw, Gliffy, Microsoft Visio, Creately, EDraw Max, DrawSQL, Quick Diagram, diagrams.net, Lucidscale and HackerDraw.
Some top alternatives to Cacoo includes Miro, FigJam, SmartDraw, Gliffy, Microsoft Visio, DrakonHub, Creately, QuickDBD, Lucidchart, AutoCloud, Quick Diagram and diagrams.net.