For now, pirates keep to the far west, around Tamara and gorgon gorge. However, as trade begins to shut down and people fear to travel, they are becoming more agressive. Their chances of finding prey are fewer and so they must go further a field to find other ships.
They are not a United force, however, the most powerful pirate is a dragonborn called Malvolio. He controls a fleet of three ships; the raven, the crow, and the hawk.