Equivalent Mutant Problem is an ongoing research problem that since let to the creation of multiple reusable mutant datasets. This paper uses these datasets to further the research by creating MutantBench, a novel open-source comparison framework that is designed with a focus on the FAIR data principles and adoptability by the community. With this, we also combined existing datasets resulting in a mutant dataset containing 4400 mutants with 1416 equivalent mutants.