When comparing ArtDesignUI vs Cirrus, the Slant community recommends Cirrus for most people. In the question“What are the best Bootstrap alternatives?” Cirrus is ranked 10th while ArtDesignUI is ranked 11th. The most important reason people chose Cirrus is:
Supports both Flexbox and CSS grid making it a great modern choice for designing web apps.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Support for all major web browsers
This includes IE 7 and its newer versions.
Pro Great technical support available
The ArtDesignUI team offers great technical support to users.
Pro Fully responsive
Pro Class prefix to prevent conflict with classes from other CSS files
Pro Full style control with JS
No need for CSS: width, height, border, icons, colors, etc...
Pro Variety of transition effects
Pro Full control of the position of all elements
Pro Support images with different dimensions
Pro Keys press listening and mouse wheel listening
Pro Full navigation control

Pro Supports Flexbox and CSS Grid
Supports both Flexbox and CSS grid making it a great modern choice for designing web apps.

Pro CSS Only
No additional JS/jQuery required to use.

Pro Mobile Responsive
Extremely responsive and supports many smaller screens.

Pro Open Source
Open source and quite actively maintained on Github.

Pro Lightweight
Much smaller than Bootstrap with just as much flexibility.
Cons
Con Looks terrible
Con Pushes some really awful ideas
Loading splash screens, non-changing URLs because everything's loaded by JS, awful HTML generation from the PHP scripts. It's just a trash fire of bad.
Con Costs €50 - €250
And that's just a year of updates.
