When comparing Creately vs Gravizo, the Slant community recommends Gravizo for most people. In the question“What is the fastest way to create and edit UML diagrams?” Gravizo is ranked 10th while Creately is ranked 13th. The most important reason people chose Gravizo is:
Can be used on GitHub using Markdown image tag.
Specs
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Pros
Pro Professionally designed templates
The templates are well thought-out and actually helps you get started. Not like many other sites where the details are already filled in.
Pro Easy and simple to use
Consist with an example diagram which we can use to draw the diagram.
Most required diagrams are available.
Pro Works across all operating system (Windows/MacOS/Linux)
Does not require flash.
Pro Intuitive UI
Easy to use drag and drop interface and a contextual toolbar that shows you all the important actions when you select an object. The automatic creation and connecting of next object alone saves tons of time.
Pro Real time collaboration
You can invite anyone by their email addresses to collaborate with your diagram. You can see others' changes to the diagram real time with the Creately Online and Desktop app.
Pro Visio Import
Pro iSO and Android apps to view diagrams
You can't edit diagram using the apps but provides a nice clean interface to view, share and comment on them.
Pro SVG import and export
Creately supports SVG (Scalar Vector Graphics) import and export to make your diagrams more attractive. It allows you to re-size your diagram as much as you want without getting it messed up.
Pro Markdown syntax
Can be used on GitHub using Markdown image tag.
Pro URL
You can use an URL which will be rendered by Gravizo and include it in your website or blog.
Cons
Con Watermark on export for free users
If you are a free user, exporting a document will create a watermark.
Con Web version requires Flash
Flash is known to have security flaws and use high resources.
Con Dekstop version is commercial
If you want to use dekstop version, you need to pay $75.00/ user.
Con Online only
No applications for local use in the free version.