Open Source ConceptDraw DIAGRAM Alternatives

    The best open source alternative to ConceptDraw DIAGRAM is Pencil Project, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to ConceptDraw DIAGRAM and nine of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to ConceptDraw DIAGRAM are LibreOffice - Draw (Free, Open Source), Dia (Free, Open Source), Penpot (Free, Open Source) and vym (Free, Open Source).

    This page was last updated Sep 24, 2021

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

      Discontinued

      It's Discontinued and no longer maintained.

      show more
    2. Draw lets you produce anything from a quick sketch to a complex plan, and gives you the means to communicate with graphics and diagrams. With a maximum page size of 300cm by 300cm, Draw is a an excellent package for producing technical drawings, general posters, and much else.


      • 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.
      show more
    3. 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.
      show more
    4. VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts. Such maps can help you to improve your creativity and effectivity. You can use them for time management, to organize tasks, to get an overview over complex contexts, to sort your ideas etc.
      show more


    5. Wireflow is free, online, open source, real-time collaborative tool for creating beautiful user flow prototypes.
    6. 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)
      • 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.
      show more
      • 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.
    Showing 9 of 9 alternatives