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Astah Professional vs Astah UML: catalog facts
Astah Professional	Astah UML
Paid Commercial license with a free trial and student options.	Paid Paid license with a free trial and student options.
macOS	macOS
UML, ERD, DFD and flowcharts in one tool API and free plugins for customisation	Focused on UML without extra complexity Mind mapping included
Paid license after the trial Focused on software modelling rather than general diagramming	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
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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