When a small concept turns into a hundred wireframes that quickly turn into a prototype, sometimes the question arises too late: Which tool would have been the right one? In our work at Centigrade, we often consider which tools we can best use to create concepts. As always, this depends on many factors and we decide on different criteria in every project. First, the context matters: Will the concept be directly implemented? Are specifications to be written? Do we do the visual design for the concept or do we hand it off directly to the customer? The decision could also hinge on whether a click prototype should be built, whether a usability test takes place or whether animated transitions between the individual wireframes/screens are prioritized for the project from the very beginning. Finally, customers also may have preferences for tools that they use themselves.
The bottom line is: there is no general recommendation for a particular tool. Still, I want to break down what advantages and disadvantages I see in some of the common tools to help other designers to decide.