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UMLet

Free UML tools for fast, beautiful diagrams.

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UMLet is a free, open-source UML tool designed for fast creation of UML diagrams. It uses a text-input and markdown-based approach instead of pop-up dialogs. Users can create custom UML elements by editing Java code at runtime. It supports class, use case, sequence, state, deployment, and activity diagrams. Available as a standalone app, Eclipse plugin, web app (UMLetino), and VS Code extension.

12 alternatives to UMLet

Ranked by how well each tool replaces UMLet: shared features, audience, price and popularity.

  1. PlantUML

    Draw UML diagrams from simple text descriptions.

    Covers 7 of 15 key features.

    Open source
    66 out of 100 match—

  2. draw.io

    Diagram software for flowcharts, org charts, UML, ER, and network diagrams

    Covers 7 of 15 key features.

    Free planOpen source
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  3. StarUML

    Software modeler for building concise models across multiple modeling languages.

    Covers 6 of 15 key features.

    61 out of 100 match—

  4. PlantText

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    Covers 5 of 15 key features.

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  5. Edraw Software

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    Covers 4 of 15 key features.

    Free plan
    57 out of 100 matchContact sales

  6. Visual Paradigm

    AI-powered visual modeling platform covering UML, BPMN, enterprise architecture, and agile

    Covers 1 of 15 key features.

    Free plan
    57 out of 100 matchContact sales

  7. UML Designer

    Graphical tool for editing and visualizing UML models.

    Covers 0 of 15 key features.

    Open source
    57 out of 100 match—

  8. draw.io

    Free diagramming application with over 100 million users. Your data, your control.

    Covers 4 of 15 key features.

    Free planOpen source
    56 out of 100 matchContact sales

  9. Modelio

    The Open Source Modeling Environment UML, BPMN, ArchiMate, SysML, Togaf, Model Driver Devé

    Covers 5 of 15 key features.

    Free planOpen source
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  10. Freeplane

    Free and open source application for creating and navigating mind maps.

    Covers 2 of 15 key features.

    Free planOpen source
    54 out of 100 matchContact sales

  11. ProcessOn

    AI-powered online flowchart and mind map tool for real-time collaboration and knowledge

    Covers 4 of 15 key features.

    Free plan
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  12. Gliffy

    Communicate complexity with intuitive diagramming.

    Covers 4 of 15 key features.

    Free plan
    54 out of 100 match$2.80/mo