Altova UModel vs kUML
Altova UModel
altova.comkUML
kuml.devSide by side
| Figure | Altova UModel | kUML |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| API | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 3 | 1 |
| Spec score · UML Modeling Software | 8.2 (#4) | 7.8 (#14) |
| Code generation | UModel generates Java, C++, C#, or Visual Basic .NET code and supports round trip synchronization between models and code. | Built-in model transformations generate JPA, OpenAPI 3.0 YAML, Kubernetes manifests, and Dockerfiles. |
| Integrations | UModel integrates with Eclipse and Microsoft Visual Studio, and its integration package is available as a free download. | The project lists CLI, Gradle, IntelliJ, Obsidian, Asciidoctor, and VS Code integrations. |
Plans
Altova UModel
- UModel 2026 Basic Edition$209, paid once
- UModel 2026 Professional Edition$349, paid once
- UModel 2026 Enterprise Edition$429, paid once
In their own words
Altova UModel
Altova UModel has no write-up on Specifiction yet; its figures are above.
kUML
kUML is a modeling tool that expresses UML 2.x, SysML 2, C4, BPMN 2.0, and ERM as a type-safe Kotlin DSL. It supports all 14 UML 2.x diagram types, with compile-time validation and IDE support. Built-in transformations generate JPA, OpenAPI 3.0 YAML, Kubernetes manifests, and Dockerfiles. Integrations include CLI, Gradle, IntelliJ, Obsidian, Asciidoctor, and VS Code. For interoperability, it supports Structurizr DSL round-tripping and optional XMI through the kuml-io-emf module. kUML also includes an MCP server for agent introspection and a kuml ai subcommand for AI-assisted modeling. It is free and open source under Apache 2.0, with no paid plans or feature limits stated. It runs on Windows, macOS, Linux, and the web, and can be deployed both self-hosted and through other means. Install options include packages for major desktop systems, Docker, and Maven Central library modules. Rendering Kotlin scripts executes their source code, so use only scripts or workspaces you trust.