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Open Source Gliffy Alternatives

The best open source alternative to Gliffy is diagrams.net. If that doesn't suit you, our users have ranked more than 50 alternatives to Gliffy and 11 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Gliffy are Pencil Project, Dia, Penpot and PlantUML.

Gliffy alternatives are mainly Diagram Editors but may also be Mind Mapping Tools or Prototyping Tools. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Gliffy.
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Gliffy iconGliffy
  51
  • Online
  • Chrome OS

"If they could see what Im thinking, they'd get it!" People just understand faster with pictures. It helps...

Learn more about Gliffy

  1. diagrams.net icon

    diagrams.net

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Chrome OS
    • Notion
    • Self-Hosted
    • Microsoft SharePoint
    • Microsoft OneDrive
    • PortableApps.com
    • Google Drive
    • Google Drive - Docs
    • Microsoft Teams
    • Google Slides
    • Google Drive - Sheets

    diagrams.net (previously draw.io) is a free online diagram drawing application for workflow, BPM, org charts, UML, ER, network diagrams. No login or registration are required and features include the ability to save locally (including SVG), a range of stencils, .

    Example AWS diagram using draw.io
    diagrams.net vs Gliffy opinions
    Almost everyone thinks diagrams.net is a great alternative to Gliffy.

    its free, its online, it saves the diagram as xml, it supports many export formats (pdf, png, etc), its easy to use

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    Fairly easy to get going using this tool for some simple diagrams I wanted to do.

    Positive comment ago
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    Much of the same features and can open gliffy files

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    it simple works very well.

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  2. Pencil is a standalone app that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features.

    Discontinued

    The last release/commit was in October 2019.

    Screenshot


  3. Dia icon

    Dia

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • PortableApps.com
    • FreeBSD
    • Xfce
    • DragonFly BSD
    • NetBSD
    • OpenBSD

    Dia is a GTK+ based diagram creation program for Linux, Unix, Mac OS X and Windows released under the GPL license.

    Screenshot
  4. Penpot icon

    Penpot

    • FreeOpen Source
    • Online
    • Self-Hosted

    Penpot is the first Open Source design and prototyping platform meant for cross-domain teams. Non dependent on operating systems, Penpot is web based and works with open web standards (SVG). For all and empowered by the community.

    Penpot artboard
  5. PlantUML icon

    PlantUML

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • Chrome OS

    PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams. The generator can be run anywhere within JVM and integrated with various application such as wiki, text editor, IDE, programming language, documentation generator, and others.

    Common PlantUML JAR GUI application that will render text file into image.


  6. Wireflow icon

    Wireflow is free, online, real-time collaborative, open source tool for creating beautiful user flow prototypes.

    Screenshot
  7. Diagramo icon

    Diagramo

    • FreeOpen Source
    • Online

    Diagramo is an online flowchart software

    • diagrams (create, edit and share)
    • organization charts (create, edit and share)
    • network diagrams (create, edit and share)
    • graphs (create, edit and share).
    Screenshot
  8. Core2D icon

    Core2D

    • FreeOpen Source
    • Mac
    • Windows
    • Linux

    Core2D is a multi-platform application for making data driven 2D diagrams. The application has built-in wyswig vector graphics editor where you can bind data to shapes, share data across multiple documents, edit documents using layers.

    Screenshot
  9. PathVisio icon

    PathVisio

    • FreeOpen Source
    • Online

    PathVisio is a free open-source pathway analysis and drawing software that allows drawing, editing and analysing biological pathways. It provides a basic set of features for pathway drawing, analysis and visualization. Additional features as plugins.

    Screenshot
  10. Archi icon

    Archi

    • FreeOpen Source
    • Mac
    • Windows
    • Linux

    The Archi® modelling tool is targeted toward all levels of Enterprise Architects and Modellers.

    Screenshot
Showing 10 of 11 alternatives