When comparing Draw.io vs Justinmind, the Slant community recommends Draw.io for most people. In the question“What are the best mockup and wireframing tools for websites?” Draw.io is ranked 4th while Justinmind is ranked 12th.
Ranked in these QuestionsQuestion Ranking
Pro Rich functionality for a web-based application
Pro Completely free
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 There is also a Desktop version
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 Reusable components
You can create reusable components that you can use over and over again.
Pro Adaptive and responsive designs
You can create adaptive and responsive designs that will react to the viewport/screen size of the user.
Pro Functional prototypes
You can create HTML prototypes with full interactions.
Pro Supports low, med, and high fidelity
You can create simple wireframes, pixel perfect screens, or anything in between.
Pro Lots of online tutorials
The free Getting Started area has plenty of advice for getting started with Justinmind.
Pro Free forever
After one month trying the pro version, it changes to a completely free version with a few limitations.
Con Behaves strangely for certain diagram types
For example the snapping function for arrows doesn't work properly for the sequence diagram template
Con Import from Visio .vsd is useless
I opened a simple diagram and it's all scattered.
Pricing is $19 per month or $495 for a perpetual license.