Neither ProcessOn nor HackerDraw offers a free trial.
ProcessOn is designed for Individuals, Medium Business and Small Business.
HackerDraw is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for ProcessOn Starts at $58.80/Year whereas for HackerDraw Starts at $3/User/Month.
Some top alternatives to ProcessOn includes Miro, FigJam, SmartDraw, Gliffy, Cacoo, Microsoft Visio, DrakonHub, Creately, EDraw Max, Quick Diagram, diagrams.net and HackerDraw.
Some top alternatives to HackerDraw includes Collaboard, Miro, FigJam, SmartDraw, Gliffy, Microsoft Visio, DrakonHub, Creately, Lucidchart, DrawSQL, diagrams.net and DigStack.