PlantUML vs Visual Paradigm

PlantUML turns textual descriptions into diagrams, covering UML forms such as sequence, use-case, class, object, activity, component, deployment, state, and timing diagrams. It also supports JSON, YAML, EBNF, regex, network, wireframe, Archimate, Gantt, mind map, and WBS diagrams. Outputs include PNG, SVG, LaTeX, EPS, and other listed formats; sequence diagrams can also be rendered as ASCII art. Its browser editor renders diagrams with JavaScript and refreshes them as the text changes. Layout options include Graphviz, Smetana, VizJs, and ELK, though ELK lacks some features. PlantUML offers integrations for tools including GitHub, GitLab, Confluence, WordPress, Slack, Visual Studio Code, Eclipse, and IntelliJ IDEA. It is free, with a plan listed at free, and runs on web, Windows, macOS, Linux, API, extension, and self-hosted platforms. Local installation requires Java, with version 11 or later recommended; Graphviz is needed for some diagrams. PlantUML can also run as a local server, which the project recommends for sensitive diagrams.

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.