Compare software

StarUML vs UMLet: catalog facts
StarUML	UMLet
Paid Commercial software; see the website for licence options.	Free Free and open source; donations are accepted through GitHub Sponsors, Patreon and PayPal.
macOS	Windows, macOS, Linux, Web
Covers most UML 2 diagram types Mixes UML, ERD, SysML, BPMN and more in one project	Sequence and activity diagrams can be created from plain text Exports to EPS, PDF, JPG, SVG and the clipboard
Commercial licence Closed source	Focused on drawing diagrams rather than full model-driven design Plain interface may feel basic next to commercial modelling tools
Downloadable app	Downloadable app, Web application
Closed source	Open source
License not stated	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Works offline	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.