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Astah UML vs Umbrello: catalog facts
Astah UML	Umbrello
Paid Paid license with a free trial and student options.	Free Free and open source under the GPL-2.0 or later.
macOS	Windows, Linux
Focused on UML without extra complexity Mind mapping included	Supports nine UML and ER diagram types Generates code from diagrams in several languages
Paid after the trial SysML and other modeling require separate editions	No macOS build listed Interface follows KDE conventions that may feel unfamiliar outside Plasma
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0-or-later
Not stated if an account is needed	No account 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.