When comparing Diagrams.net vs Microsoft Visio, the Slant community recommends Diagrams.net for most people. In the question“What are the best flowchart / diagram softwares?” Diagrams.net is ranked 1st while Microsoft Visio is ranked 3rd.
Ranked in these QuestionsQuestion Ranking
Pro Completely free
Pro Rich functionality for a web-based application
Pro There is also a Desktop version
Pro Integrates with multiple cloud storage services
Draw.io offers saving files directly to services such as Google Drive, OneDrive or Dropbox along with saving to to computer.
Pro Good list of different output formats
Draw.io supports export for PNG, GIF, JPEG, PDF, SVG, HTML, and XML.
Pro Internet Explorer 6-8 and touch device support
Draw.io works with every browser (even IE 6) without plugins.
Pro Real-time collaboration
Pro Complete set of tools
Visio has the most thorough set of standard support and tool-set.
Pro De facto standard
Microsoft Visio is the de facto industry standard diagram creation software.
Pro Looks good
Pro Easy usage
Con Import from Visio .vsd is useless
Even simple diagrams get all scattered.
Con Behaves strangely for certain diagram types
For example the snapping function for arrows doesn't work properly for the sequence diagram template.
Con Very clumsy for state diagrams, limited features
Con Pretty expensive
Con Imperfect integration with Office
Since Visio was acquired, not originally developed by Microsoft, integration is not as seamless as the core Office Suite is known for. Diagrams can get corrupted while importing from Visio to Word or Powerpoint.