I bridge SMS to matrix, I currently have no use for slack, but if I were forced to use it I would bridge that to matrix as well.
Of course the matrix IRC bridges are also quite good. I'm in a couple of bridged IRC rooms.
Of course the matrix IRC bridges are also quite good. I'm in a couple of bridged IRC rooms.
It works well enough for me, though I don't use SMS too often though.
What I did like is that I can add another account to a room such that I can monitor texts from both matrix accounts.