Open source alternatives to Visio

2 free tools that do the job of Visio, most stars first. Of these, 1 is a web app you can run on your own server and 1 is a library for your own code.

JobDesign and whiteboards

2 alternatives

Sorted by most stars.

Sort Most stars Recently updated Newest

• 

  PlantUML

  Library

  Generate UML and other diagrams from plain text.

  Library you add to your own code

  Stars

  13,400

  Updated

  5 days ago

  License

  LGPL-3.0

• 

  draw.io

  Draw flowcharts, UML and network diagrams in the browser or as a desktop app.

  Also an alternative to Lucidchart

  Stars

  9,224

  Updated

  5 days ago

  License

  Apache-2.0

More alternatives in Design and whiteboards

All Design and whiteboards tools

• Photoshop3 free alternatives
• Illustrator1 free alternative
• Canva2 free alternatives
• Figma3 free alternatives
• Lucidchart2 free alternatives
• Miro3 free alternatives
• Eraser1 free alternative
• Adobe XD1 free alternative

About these numbers. Stars, dates and licenses come from GitHub through ecosyste.ms, collected on 10 Nov 2026; they can lag GitHub by a few days. A project is listed only if it has 300 or more stars, was updated in the last 12 months and states a license. A listing is not an endorsement, and we have not tested these tools on Antideploy yet. Logos belong to their projects and companies and are shown only to say which is which.