Maelstrom is one of the major Gangs in Cyberpunk 2077. It was formed from the members of the Metal Warriors gang, which was destroyed by Inquisitors. Members of some other gangs joined Maelstrom later on. Inquisitors are their main enemies and they always try to destroy them when they meet them.
The main income of this gang comes from selling illegal meds and drugs. They also sell their power and perform a hit job, which they usually do in a brutal fashion.