Really depends! In New York City where I'm based, my friends have been having a lot of luck switching over to Mont Sky.
They seem to have been steadily taking over the residential sales market which has pretty much been under a death grip by the bigger brokerages in town. Had a few friends deciding between them and Compass, but ultimately decided on Mont Sky for the opportunity to work on verified sales referrals (i.e. buyers and exclusive listings), high commission splits (i think 75% starting to the agent) and top tier tools and training.
I don't think they build much of the software in-house like Compass, but at the same time I don't think they're spending as much on overhead if they can just outsource it by vendors who are already providing those services. To each their own. Good luck!