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StarUML vs Astah UML: catalog facts
StarUML	Astah UML
Paid Commercial software; see the website for licence options.	Paid Paid 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	Focused on UML without extra complexity Mind mapping included
Commercial licence Closed source	Paid after the trial SysML and other modeling require separate editions
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
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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