All diagram elements are represented by different shapes like rectangle, oval, polygon, cone, etc.

To make diagrams, each software offers multiple sections containing diagram elements like Actor, Database, Connectors, Class Object, Entity, etc. In some software, you can even create mind maps and concept maps. Some of the popular diagrams and charts that you can make in these alternatives are UML diagrams, Flow charts, Block Diagram, Entity-Relationship Diagrams, and Network Diagrams. In these software, you can create a wide range of diagrams, similar to Visio. Along with software, you can also download and edit source codes of these diagramming software without restrictions.

For users who want Visio features in a free and open-source package, I have created this list of open source Visio alternatives. However, it is also a paid and closed source software that comes with Microsoft Office 365 package. Visio is a popular Microsoft program to create professional diagrams and charts in a collaborative environment.

Here is a list of best free open source Visio alternative for Windows.

Open office visio equivalent