Yes, both Hava and Designer offer a Free Trial.
Hava is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Designer is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Hava begins at $44/Month when Billed Yearly, while pricing details for Designer are unavailable.
Some top alternatives to Hava includes Microsoft Visio, CloudSkew, AutoCloud, Isoflow, Designer, Cloudcraft, Lucidscale, Hyperglance, Qualified, Workvivo, AWS CloudFormation and IFTTT.
Some top alternatives to Designer includes Miro, FigJam, SmartDraw, Gliffy, Microsoft Visio, DrakonHub, DrawSQL, AutoCloud, UpDiagram, Quick Diagram, diagrams.net and HackerDraw.