When comparing Blueprint vs Cirrus, the Slant community recommends Cirrus for most people. In the question“What is the best CSS framework?” Cirrus is ranked 23rd while Blueprint is ranked 53rd. 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 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 No preprocessor support
No support for Sass, Less, or Stylus.
Con Non-responsive
Does not follow the responsive web development philosophy.
Con Outdated
It was last updated in 2011.
