When comparing Dia vs XMind, the Slant community recommends XMind for most people. In the question“What are the best flowchart / diagram softwares?” XMind is ranked 2nd while Dia is ranked 10th. The most important reason people chose XMind is:
XMind, except for Plus and Pro features, is open source with code available on [GitHub](https://github.com/xmindltd).
Ranked in these QuestionsQuestion Ranking
Pro Tons of icon sets
Has flowcharts, uml, chemical engineering, electronics, and dozens of other complete sets, built in.
Pro Free and open source
Pro Custom gzipped XML format
Pro Free and open source
XMind, except for Plus and Pro features, is open source with code available on GitHub.
Pro Clean, easy to use UI
XMind's interface is uncluttered and easy to overview. It allows for quick, intuitive navigation and use. For example, Enter adds more items to a node, Tab adds a child node, all commonly used shortcuts works as expected, etc.
Pro Extremely flexible
XMind is capable of displaying information in a multitude of ways (classic mindmaps, charts, timelines, decision trees, etc), it can add labels, clip-art, notes, files, audio recordings, it can then take the project and export it in a variety of ways including an synced gantt chart.
Works on Windows, OS X and Linux.
Pro A wide variety of templates available
XMind has preset templates available that allow getting started quickly. There are templates for project planning, status reports, dashboards, organizational charts, swot analysis, timelines, decision trees, weekly plans, among others.
Pro Built-in Gantt view
XMind has a build-in Gantt chart view and with the pro version, XMind allows synchronizing it.
Pro Can copy entire hierarchy to/from Word with a simple copy/paste action
XMind allows quickly copying over structure of the mindmap as a tab-indented list starting at the node selected. It can also take a tab-indented list and create a mindmap from it.
Pro Local Network Sharing
Pro XMind Plus & Pro adds more export options
XMind Plus & Pro can export to Word, PowerPoint, PDF, SVG & MindManager.
Pro Task management (pro)
Pro Audio recording (pro)
Pro Very good performance
The app is incredible complete, flexible, and fast.
Dia has not been updated since 2009. It's already a very complete piece of software, but still sad.
Con UX is a joke
UX is not good enough. For example, to edit element text you must double-click it, then click text box, and then you can start typing text.
Con Newer versions become heavyweight and bloated
Even though there are more features, starting with version 8 application is very unstable. A lot of users still prefer version 7.5 or 6.5.
Con Mobile support for iOS devices only
There is a native app for iPhones/iPads, no Android version though.
Con Used to offer their NOT-free products
Con FreeMind files sometimes don't work
XMind claims it can read FreeMind files, but certain .mm file saves from Freeplane or MindMup generate an error on open.