kUML vs Visual Paradigm

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.

Visual Paradigm is a visual modeling and development platform covering diagramming, code engineering, agile management, and enterprise architecture. It supports UML, SysML, flowcharts, organization charts, ER, BPMN, data-flow, EPC, mind maps, C4, Gantt, wireframes, and cloud architecture diagrams. AI can generate class diagrams, flowcharts, and user stories from descriptions, while the Unified Platform provides access to more than 100 specialized apps. Users can work across the desktop application and external web browsers, with project synchronization between them. Visual Paradigm Cloud supports concurrent design, review, and commenting. Listed online collaboration limits are three participants for Free, five for Starter, and unlimited for higher plans. Integrations include Jira, Confluence, Eclipse, NetBeans, IntelliJ IDEA, Visual Studio, and Android Studio. The Free plan is strictly for non-commercial use and includes more than 40 AI-powered apps and basic diagramming. Starter costs $4 a month billed annually; desktop subscriptions start with Modeler at $6 a month billed monthly. A 30-day trial is available.