When comparing Mango vs Iris, the Slant community recommends Iris for most people. In the question“What are the best web frameworks for Go?” Iris is ranked 13th while Mango is ranked 20th. The most important reason people chose Iris is:
Iris is a "batteries included" web framework, which means that a lot of features already come out of the box. This way you don't have to spend time and find third-party libraries to integrate to the framework for most of the tasks you need to complete.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Modular
Mango is very modular. You get to choose which libraries to include in your project.
Pro No need to find and install external libraries
Iris is a "batteries included" web framework, which means that a lot of features already come out of the box. This way you don't have to spend time and find third-party libraries to integrate to the framework for most of the tasks you need to complete.
Pro Efficiency
Efficiency by using a light engine.
Pro Development
Pro API
If you're familiar with expressjs or other modern web frameworks, Iris will make you feel at home.
Pro More than feature complete
Pro More than 250 examples
More than 250 examples for implementing web application.
Pro Low amount of bugs
Most issues are questions, few bug reports and if a bug is found it's quickly patched.
Pro Good for big projects
Iris is a good framework for big projects and the author helps solving problems.
Cons
Con Abandoned
Last commit on Github was on 2013.
Con Previously experience with net/http
Previously experience with the Go's standard net/http package is necessary for you to move forward with Iris.