Yes, both Mermaid Chart and EDraw Max offer a Free Trial.
Mermaid Chart is designed for and undefined.
EDraw Max is designed for and Small Business.
Pricing for Mermaid Chart Starts at $80.00per user / year when Billed Yearly whereas for EDraw Max Starts at $99/Year.
Some top alternatives to Mermaid Chart includes and undefined.
Some top alternatives to EDraw Max includes Miro, FigJam, MindManager, SmartDraw, Gliffy, Microsoft Visio, Creately, Lucidchart, DrawSQL, Quick Diagram, diagrams.net and yEd Graph Editor.