Altova UModel vs StarUML

Altova UModel

Figure	Altova UModel	StarUML
Price from	—	—
Free plan	—	—
Free trial	Yes	Yes
Open source	—	—
Windows	Yes	Yes
macOS	—	Yes
Linux	—	Yes
Plans published	3	2
Spec score · UML Modeling Software	8.2 (#4)	8.1 (#8)
Code generation	UModel generates Java, C++, C#, or Visual Basic .NET code and supports round trip synchronization between models and code.	Code generation for Java, C#, C++, and Python is available through open-source extensions.
Headquarters	Vienna, Austria, and Beverly, Massachusetts, United States	Seoul, Republic of Korea
Purpose	UModel is a visual UML software modeling tool that can generate source code and project documentation or reverse engineer existing programs into UML diagrams.	StarUML describes itself as a software modeler for agile and concise modeling.
Support	Altova provides a technical support form and lists online training among its support resources.	The privacy notice directs questions and concerns to [email protected].
Trial	The fully enabled evaluation license lasts 30 days and is requested after downloading and installing the software.	The download page offers a 30-day free trial.
UML diagrams	UModel supports all 14 UML diagram types and UML style diagrams for XML Schemas and tables in SQL databases.	StarUML supports most UML 2 diagrams, including class, package, component, deployment, use case, sequence, statechart, and activity diagrams.

Altova UModel has no write-up on Specifiction yet; its figures are above.

StarUML has no write-up on Specifiction yet; its figures are above.