When comparing Flinto vs UXPin, the Slant community recommends Flinto for most people. In the question“What are the best tools for prototyping mobile interactions/animations?” Flinto is ranked 10th while UXPin is ranked 12th.
Ranked in these QuestionsQuestion Ranking
Pros
Pro UXPin has great advanced features for prototyping
integration if this then dop that and custom javascript functionality
Pro Actively developed
UXPin is constantly being updated with new features.
Pro Import from PhotoShop and Sketch
A pro UXPin account will allow you to import existing projects from PhotoShop or Sketch.
Pro Extensive library of elements and patterns
UXPin offers elements from a wide range libraries. This includes responsive frameworks such as Bootstrap and Foundation, and libraries specific to mobile prototyping.
Cons
Con Mac Only
Con Expensive subscription model
$29 per user/mo ($350 pa) will soon rack up compared to a standalone product like Axure PRO ($450) which has a license that lasts years (they have given out free updates for the last 2 versions).
Con Steep learning curve
UXPin is one of the more complex prototyping tools. Combined with a lack of documentation, it can be discouraging for first time users.