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Astah UML vs StarUML: catalog facts
Astah UML	StarUML
Paid Paid license with a free trial and student options.	Paid Commercial software; see the website for licence options.
macOS	macOS
Focused on UML without extra complexity Mind mapping included	Covers most UML 2 diagram types Mixes UML, ERD, SysML, BPMN and more in one project
Paid after the trial SysML and other modeling require separate editions	Commercial licence Closed source
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
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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