When comparing Growler vs IHP, the Slant community recommends IHP for most people. In the question“What are the best Haskell web frameworks for building RESTful web services?” IHP is ranked 10th while Growler is ranked 13th. The most important reason people chose IHP is:
With the code generators even haskell beginners can easily build CRUD apps.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Clean, simple route building
Growler improves on Scotty's route building functions, allowing hierarchical declarations rather than requiring each endpoint to be fully specified.
Pro Easy for beginners
With the code generators even haskell beginners can easily build CRUD apps.
Pro Under the hood
Code generators, database schema editors, etc. work with Haskell and SQL files, which can also be edited manually, to get 'under the hood'.
Pro Instant live reloading
Makes for a super smooth development experience.
Pro HSX
If you have experience with react, you feel right at home with the HSX view syntax.
Cons
Con Potentially unstable API
Growler is still at an experimental stage and users are warned that breaking changes may happen between versions.
Con (Small) Server deployment
I'm a bit unclear on the memory requirements for the server (which becomes less of an issue every following year).