Compare software

StarUMLAstah Professional
Paid

Commercial software; see the website for licence options.

 Paid

Commercial license with a free trial and student options.

macOS macOS
  • Covers most UML 2 diagram types
  • Mixes UML, ERD, SysML, BPMN and more in one project
  • UML, ERD, DFD and flowcharts in one tool
  • API and free plugins for customisation
  • Commercial licence
  • Closed source
  • Paid license after the trial
  • Focused on software modelling rather than general diagramming
Downloadable app Downloadable app
Closed source Closed source
License not stated License not stated
Not stated if an account is needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked October 1, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.