Dropwizard vs Hapi
When comparing Dropwizard vs Hapi, the Slant community recommends Hapi for most people. In the question“What are the best backend web frameworks?” Hapi is ranked 27th while Dropwizard is ranked 28th. The most important reason people chose Hapi is:
Hapi was developed and is still being used by Walmart. Being backed by such a major company means that it will not lose support any time soon and most importantly it's being developed by professionals and that you will always get support for it.
Specs
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Pros
Pro Enhanced productivity and less timewasting
The application can be run and debugged from the IDE without the need to recompile or redeploy the WAR file. This is because a Dropwizard web application creates on main program which starts the jetty container.

Pro Application metrics integrated into the framework
Dropwizard comes with application metrics integrated out of the box. These metrics provide a lot of useful information such as request/response time.
For example, to get the execution time of a method, the @Timed
annotation is used.

Pro Quick project bootstrap
Starting a project with Dropwizard si very easy and bootstraping is quick and painless. All that's needed is a single dependency added in the pom.xml
file and it's ready to go.
Pro Backed by a major corporation
Hapi was developed and is still being used by Walmart. Being backed by such a major company means that it will not lose support any time soon and most importantly it's being developed by professionals and that you will always get support for it.
Pro Consistency across applications
Hapi's philosophy is that configuration is more important than code. This is especially useful for very large teams because it helps developers maintain consistency and reusability throughout their code.
Cons
Con Does not allow a lot a freedom of choice
Dropwizard removes a lot of freedom that the developer may have with other frameworks because of the fact that it tries to do everything itself. It chooses the best Java libraries for the job required, without allowing the developer much choice.
Con Requires too much boilerplate
Hapi seems to be made with large applications in mind. The sheer amount of boilerplate code it requires is simply not practical for a small web app. This also means that there are few examples of Hapi applications around for beginners to learn from.
