Cursor enhances individual developer productivity inside an editor. It provides inline completions, chat, and an Agent mode that can make multi-file edits on request. The developer remains in the loop and in the editor at all times.
Fleet operates at an entirely different level: it manages a team of autonomous agents running in tmux sessions, each assigned a role (developer, reviewer, release-manager), reacting to GitHub events, handing work off to each other via a shared event bus, and operating without constant human supervision.