Cloud9 is a professional esports organization based in California that sponsor teams that compete in several games.
Cloud9 may also refer to:
Cloud9 Technologies, a voice turret phone system used by financial traders Cloud9 (service provider), a mobile phone company in the Isle of Man Cloud9 IDE, an open source cloud web-based integrated development environment Cloud9, a fictional big-box store in Superstore (TV series)
See also Cloud Nine (disambiguation)