Question about general functionalities?

I was hoping you could answer if GanttProject has the following features:

  • Ability to create templates
  • Forward and backward planning of projects
  • Holiday calendar
  • Ability to assign a task to a team
  • Gantt Charts
  • Overview of projects that are in-progress and completed
  • Complete tasks manually and programmatically (e.g. tracked, using expression)
  • On-premise software deployable service
  • REST API
  • Customizable logo and themes

Sorry, but it looks as if you didn’t bother to look at the very beginning of the landing page. GanttProject is a desktop application. What sort of REST API do you expect? How can it be anything else than “on premise”?

Did you try to launch GanttProject at least once?

Sorry again, it is absolutely okay to ask for help with questions which have no obvious answers. But this questionnaire looks as if you’re trying to delegate your job to someone else.

For all these above requirement you should look at some dedicated Project CRM…not Grant Chart

Please google for Project CRM – like ZOHO, MS Dynamics 365, etc…etc…