Open source · macOS · Windows · Linux · Browser

Modelling, without the setup.

OpenBee is a free desktop app for BPMN, EPC, ER, UML, Petri nets and flowcharts. It opens your Bee-Up models and runs natively on macOS, Windows and Linux.

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Class diagrams generate Java, Python, C++ or TypeScript skeletons.

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OpenBee is free and open source. Each download is a single app with nothing else to install.

macOSApple Silicon and Intel · .dmg Windows64-bit · .zip Linuxx86-64 · .tar.gz

You can also use OpenBee in the browser without installing anything; open diagrams are kept in that browser until you close them. All versions are on the releases page. To build from source, run cargo run --release with Rust 1.95 or newer.