BOUML vs Visual Paradigm

BOUML is a free UML 2 toolbox for modeling systems and generating code, available as desktop software for Linux, macOS, and Windows. It supports use case, sequence, communication, class, composite class, activity, state, object, composite object, component, and deployment diagrams. Built-in generators cover C++, C, Java, PHP, Python, IDL, and MySQL; reverse-engineering tools are listed for C++, Java, PHP, and MySQL, and round-trip tools for C++, Java, and PHP. Plug-outs provide XMI 1.2 and 2.1 generation, XMI 2.1 import, and Rational Rose model import. External plug-outs can be written in C++ or Java and run separately from BOUML. An HTML documentation generator can output diagrams as PNG or SVG. Project control and synchronization tools support work by several people. The maker says it can handle several thousand classes while using little memory. Version 7.11 is identified as the final release, with patch 4 listed for some distributions. Releases since version 7.0 are free to use; the maker states they come without warranty.

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.