Who actually makes Mortgage BOSS
Mortgage BOSS is built by M3 Tech, the technology division M3 Group stood up in 2018 to build software for the brokers inside its own network. It is not a Filogix or Finastra product — Filogix appears on M3's own partner page as one integration among several, which is a very different relationship.
That matters for the comparison because M3 Tech's incentives are a network's incentives. The platform exists to make M3 brokers more productive and to make M3 membership more valuable. Both of those are good things, and they are why BOSS is deeper than most brokerages could justify building or buying alone.
M3 Tech reports more than 8,000 brokers on the platform and over $75 billion in annual origination flowing through it. This is not a small or under-resourced product, and any comparison that treats it as one is not worth your time.