Eclipse Papyrus vs JetUML

Eclipse Papyrus is a free modeling environment for UML and related extensions, with desktop and web options. It lists implemented standards including UML 2.5, SysML 1.6, fUML 1.3, ALF 1.0.1, MARTE 1.1, PSCS 1.1, PSSM 1.0, and ISO/IEC 42010. Teams can tailor profiles, model explorers, diagram notation and style, properties views, palettes, and creation menus. With Moka, models can run through animation and simulation. Papyrus-Web supports simultaneous work on a shared model in a browser, with changes visible to stakeholders; its editors cover diagrams such as class, component, use case, activity, state machine, and communication. Desktop downloads are listed for 64-bit Windows and Linux, as well as Intel and Apple Silicon macOS. Papyrus requires a Java 21-compatible JVM and is released under the Eclipse Public License v2.0. Related tools provide code generation and reverse engineering in C++, C, Java, and Python, plus documentation generation for LibreOffice, Word, and PDF. Papyrus-Web can be tested locally with Rancher Desktop or Docker Desktop, with deployment documentation linked.

JetUML is a free desktop editor for sketching software designs with UML. It supports class, sequence, state, object, and use case diagrams, keeping its feature set focused on core diagramming. Association edges are laid out automatically, and moving nodes changes their paths. A validity check reports diagram problems through temporary notifications. You can export diagrams as SVG, PNG, or JPEG images, or copy them to the system clipboard for use elsewhere. JetUML saves diagrams as JSON in a documented open format with a schema for each diagram type. It runs on Windows, macOS, and Linux. Distribution uses Java archives, including an operating-system-independent archive that requires Java and JavaFX; a community Nix package is available for macOS and Linux. The application is licensed under GNU GPL version 3 or later. JetUML states that it collects no information and accesses the network only to open Help-menu web pages. Larger diagrams can reduce performance.