As an indie game dev I would like to deal with as little of a stack as possible. So what high level services could you use to achieve a similar chat feature without having to roll and maintain all of your own infrastructure?

To me something like Firebase could work for this?

It seems like when game dev companies grow they love to blow out all of their own in house solutions so they can have complete ownership and control. But is the cost of ownership of your stack really worth the maintenance costs? Why not outsource as much of the stack to another company that can take advantage of economies of scale?