Modelio

At a glance

• Editor score
  6.7 / 10
• Pricing
  Free plan
• Best for
  Free UML, BPMN, and enterprise modeling
• Free plan
  Yes
• Paid from
  Free
• Facts checked
  20 Sep 2026

• Where it wins

  • Supports UML, BPMN, ArchiMate and SysML modeling
  • Includes consistency checking, version history and automatic layout
  • Offers XMI, BPMN and HTML exchange and publishing options

• Where it doesn't

  • Runs on Windows and Linux desktop environments
  • Its focus is standards-based modeling rather than general diagramming
  • Collaboration is provided through synchronous model work, not a hosted workspace

Our verdict on Modelio

Modelio is an open-source desktop modeling environment for developers, analysts, software architects and systems architects. It brings UML, BPMN, ArchiMate and SysML into one workspace, with diagrams, model consistency checking and links between BPMN and other supported standards. That makes it a strong fit for teams documenting software, business processes, enterprise architecture and systems engineering without a paid license.

Its main strength is the depth of its modeling scope. UML diagrams are paired with consistency checking, while BPMN models can connect with UML and other standards. ArchiMate and SysML extend the environment into enterprise architecture and systems modeling. Model exchange includes XMI import and export, BPMN .bpmn import and export, and Modelio project archives. HTML model publishing supports sharing model output beyond the desktop application. Jython scripting and a Java module API provide extension paths, while automatic diagram layout can help organize models. Teams can also work with real-time synchronous collaborative models, and version history is included in the published category specifications.

The open-source edition is distributed through downloadable desktop packages, so its value is clearest for organizations that want a free modeling environment and can standardize on Windows or Linux. It is less suited to teams that require browser-based access, broader platform coverage or a general-purpose diagramming workspace. Buyers should choose Modelio for multi-standard architecture and process modeling, especially when model exchange, publishing and consistency checks matter. Teams seeking a hosted collaboration product or a wider desktop and web ecosystem should consider alternatives built around those needs.

Your product? Our editors can test Modelio in depth and publish a review, labelled as paid · from $149/mo →

Modelio pricing

Modelio fact sheet

Alternatives to Modelio

• draw.ioA broad, flexible diagramming editor for teams that want free cross-platform coverage.9.4
• Visual ParadigmA broad modeling suite with collaboration, engineering tools, and a free plan.9.2
• LucidchartA broad, collaborative diagramming workspace with a free tier and web-only access.9.0

See all Modelio alternatives →

Featured on iTechGuides

Modelio is listed in our Diagram Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update