Compare software

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