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Dev tools · January 28, 2023

PlantUML based collaborative UML editor is now open source

A collaborative UML editor; build with etherpad and plantuml - AlexITC/collabuml

PlantUML based collaborative UML editor is now open source launched on January 28, 2023 with 185 votes, #181 of 3,901 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 3 years on.

Visit github.com ↗Alternativestop 5% of January 2023

In plain words

PlantUML-based collaborative UML editor is an open-source development tool that enables teams to create and edit UML diagrams together in real time. Designed for software developers and architects who need to visualize system design and documentation, it leverages PlantUML's text-based diagram syntax to streamline diagram creation. The tool is particularly suited for teams working on collaborative projects who prefer version-control-friendly, code-like diagram definitions rather than traditional graphical editors.

written from the facts on this page · September 2026

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