When comparing AIDA/web vs Phoenix, the Slant community recommends Phoenix for most people. In the question“What are the best backend web frameworks?” Phoenix is ranked 1st while AIDA/web is ranked 47th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Conceptually simple, yet complete
Most frameworks seem to tend towards conceptually simple, but also stripped down (such as Python's Flask), or go the other way and be very fully featured, yet complex. AIDA/web, however, manages to give a programmer a lot of expressive power, while remaining conceptually simple -- an afternoon will get you building websites, and you'll feel comfortable with AIDA/web in just a week or so.
Pro Smalltalk
Program your web app in Smalltalk, an enjoyable and easy language to use. Smalltalk was the language to inspire modern Object-Oriented programming and pioneered many of the programming concepts used today, such as MVC.
Pro Very positive reviews
Pro Relatively big community
It has the biggest community from all Elixir web frameworks so there are examples and tutorials all over the place and you can quickly find help.
Pro Easy to learn
The official guides are really well written.
Pro Will be easy to learn for Rails developers
Cons
Con Relatively inactive
At the time of this writing, AIDA/web is 26 years old (first created in 1996). While maintaining pace with modern technologies (REST, Javascript, etc.), the community is small. You might find it difficult to find timely help, find resources and tutorials, etc.